The pororoca is a tidal bore, with waves up to 4 meters high that travel as much as 13 kilometers inland upstream on the Amazon River. Its name comes from the indigenous Tupi language, where it translates into "great destructive noise". It occurs at the mouth of the river where river water meets the Atlantic Ocean. The phenomenon is best seen in February and March.

The wave has become popular with surfers. Since 1999, an annual championship has been held in São Domingos do Capim. However, surfing the Pororoca is especially dangerous, as the water contains a significant amount of debris from the shores of the river (often entire trees). In 2003 the Brazilian Picuruta Salazar won the event with a record ride of 12.5 kilometers during 37 minutes.

wikipedia and playak.com, surftherenow.com, boock.files.wordpress.com, rosanevolpatto.trd.br, web.mac.com, i.domaindlx.com, surfersvillage.com, globoesporte.globo.com

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From sky-high suspension bridges to dilapidated rope bridges, these crossings aren’t for the meek.

All bridges serve a purpose, whether utilitarian or inspirational. And some of them add a distinct element of fear. But you don’t have to be in a remote part of the world: scary bridges exist everywhere, in all shapes, sizes, and heights. And crossing over them can be the ultimate in adventure travel.

Many courageous (or foolhardy) travelers seek out hair-raising bridges just for the thrill. The bridges along the route to Colombia’s National Archaeological Park of Tierradentro are a good example. Though there are safer routes via bus from La Plata, some thrill-seekers choose to ride motorcycles over slippery bamboo crossings deep in the mountains, where one wrong move could mean plunging into a turbulent river.So get ready to face your fears—or maybe find your next adventure—with our list of the world’s most petrifying bridges.

Aiguille du Midi Bridge France

Don’t look down. At this height, you’ll want to keep your eyes locked on the panorama of the craggy French Alps. Fortunately, the bridge itself is short, making for an easy escape if acrophobia sets in. But those truly afraid of heights probably won’t even see the bridge; getting here requires taking a cable car that climbs 9,200 vertical feet in just 20 minutes.

Where: The summit of Aiguille du Midi in the Mont Blanc massif near Chamonix.

Stats: 12,605 feet above sea level.

Royal Gorge Bridge Colorado

America’s highest suspension bridge may be breathtaking for some, but those scared of heights may be left gasping for air as they stare straight down nearly 90 stories at the Arkansas River below. Completed in 1929, the bridge didn’t have stabilizing wind cables until 1982.

Where: Royal Gorge, Colorado, over the Arkansas River.

Stats: 969 feet above the gorge; 1,260 feet long.

Trift Suspension Bridge Switzerland

One of the Alps’ longest and highest pedestrian suspension bridges, Trift was built in 2004 to reconnect hikers to a hut made inaccessible by a retreating glacier. A replacement in 2009 gave this bridge higher handrails and stabilizing cables to prevent it from swinging violently in the wind. But it still provides an adrenaline rush.

Where: Trift Glacier, near the town of Gadmen in the Swiss Alps.

Stats: 328 feet high; 558 feet long.

Carrick-a-Rede Rope Bridge Northern Ireland

First things first: nobody has fallen off this bridge. However, many visitors who walk across simply can’t handle the return and have to go by boat. It used to be even scarier. Erected by fishermen who went to the island to catch salmon, the original bridge had only a single handrail. The rope bridge eventually became popular with tourists seeking a thrill, and the National Trust replaced it with a sturdier structure with two handrails.

Where: Near Ballintoy in County Antrim, Northern Ireland.

Stats: 65 feet long; nearly 100 feet above the rocks below.

Capilano Suspension Bridge Canada

Originally built in 1889, this simple suspension footbridge surrounded by an evergreen forest is very high, fairly narrow, and extremely shaky—the cedar planks bounce on their steel cables as you walk across them. If the bridge doesn’t scare you, wait until the spring of 2011; the Cliffhanger attraction will allow visitors to climb across a series of suspended walkways attached to a cliff.

Where: North Vancouver, British Columbia, across the Capilano River.

Stats: 450 feet long; 230 feet high.

Mackinac Bridge Michigan

Some drivers get so nervous about crossing this five-mile-long bridge that they don’t even go. And this happens so often that the Mackinac Bridge Authority will drive your car or motorcycle for you (and for free). The biggest fear is the wind, which often exceeds 30 miles per hour on the bridge.

Where: Between Michigan’s Upper and Lower Peninsulas.

Stats: 5 miles long; 199 feet above the water.

Puente de Ojuela Mexico

This bridge leads to a ghost town, but it’s the squeaky wood floor that makes it scary. Fortunately, steel cables suspended from two towers bring a greater feeling of safety. Still, steel is a relatively recent addition: when German engineer Santiago Minhguin built this bridge in the 19th century, those towers were made of wood.

Where: The ghost town of Ojuela, an old mining settlement in the northern state of Durango, Mexico.

Stats: 1,043 feet long; 2 feet wide; 360 feet above a gorge.

Chesapeake Bay Bridge Maryland

Drivers are notoriously afraid of this bridge, as it’s subjected to frequent—and often violent—storms. And when the bad weather hits, forget about visibility: get to the middle of this five-mile-long bridge and you can barely see land.

Where: Spanning the Chesapeake Bay to connect Maryland’s eastern and western shores.

Stats: Nearly 5 miles long; 186 feet high at its highest point.

Monkey Bridges Vietnam

It may seem that only monkeys could make it across traditional monkey bridges—after all, they’re typically made of a single bamboo log and one handrail. However, the name comes from the stooped monkey-like posture you have to maintain when crossing, so as not to plunge into the river below.

Where: Various points across the Mekong Delta at the southern tip of Vietnam.

Stats: These bridges are built by hand by local residents and vary from town to town. Newer ones are made of concrete.

Hussaini Hanging Bridge Pakistan

Massive gaps between the planks, a wild side-to-side swing: there are reasons this is considered one of the world’s most harrowing suspension bridges. While rickety cable and wood bridges are common in this area, crossing this bridge over the rapidly flowing Hunza River is particularly frightening, as the tattered remains of the previous bridge hang by threads next to the one currently in use.

Where: In the village of Hussaini in Northern Pakistan, crossing the Hunza River.

Stats: Floodwaters reportedly submerged the bridge in May 2010. However, due to its draw as a popular adventure-travel activity, the bridge is likely to be rebuilt.

travel.yahoo.com and flickr users: woolyman, kilaana, ohrwurm67, rowanC82, naveen chander joshi, odalaigh, mario_mvc, paflip25, goosmurf, toufeeque

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The odds of winning $1 million in a lottery are astronomical, but one Missouri man has beaten them - twice.

Fifty-seven-year-old Ernest Pullen of Bonne Terre won $1 million with a "100 Million Dollar Blockbuster" Scratchers ticket in June. This month, he won another $2 million with a "Mega MONOPOLY" Scratchers ticket.

Pullen says he considers himself a "lucky guy."

He's opted to take the cash payment instead of the annuity for both wins so he received $700,000 for the first one and about $1.3 million for the second. That's before taxes.

Pullen says he'll use the money to fix up his new house.

emirates247.com

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Extreme weather includes weather phenomena that are at the extremes of the historical distribution, especially severe or unseasonal weather.

Increasing dramatic weather catastrophes are due to an increase in the number of severe events and an increase in population densities, which increase the number of people affected and damage caused by an event of given severity. The World Meteorological Organization and the U.S. Environmental Protection Agency have linked increasing extreme weather events to global warming, as have Hoyos et al. (2006), writing that the increasing number of category 4 and 5 hurricanes is directly linked to increasing temperatures. Similarly, Kerry Emmanuel in Nature writes that hurricane power dissipation is highly correlated with temperature, reflecting global warming. Hurricane modeling has produced similar results, finding that hurricanes, simulated under warmer, high CO2 conditions, are more intense than under present-day conditions. Thomas Knutson and Robert E. Tuleya of the NOAA stated in 2004 that warming induced by greenhouse gas may lead to increasing occurrence of highly destructive category-5 storms. Vecchi and Soden find that wind shear, the increase of which acts to inhibit tropical cyclones, also changes in model-projections of global warming. There are projected increases of wind shear in the tropical Atlantic and East Pacific associated with the deceleration of the Walker circulation, as well as decreases of wind shear in the western and central Pacific. The study does not make claims about the net effect on Atlantic and East Pacific hurricanes of the warming and moistening atmospheres, and the model-projected increases in Atlantic wind shear.

wikipedia, flickr and Mike Hollingshead - extremeinstability.com

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Not all beautiful frogs depicted here are poisonous, but those who are - can be very deadly indeed. The most poisonous animal is not a snake or a spider. It's a beautiful little frog! "Most frogs produce skin toxins, but the dart poison frogs from Central and South America are the most potent of all. The golden poison frog, called terribilis (the terrible), is so toxic that even touching it can be dangerous. A single terribilis contains enough poison to kill 20,000 mice or 10 people. It is probably the most poisonous animal on Earth."

"Their poison contains toxins that dull the nerves and produce heart and repiratory (sic.) failure. The skin of an adult P. terribilis has enough batrachotoxin to kill 20,000 mice, or 100 adult humans. Two-tenths of a microgram of batrachotoxin is lethal in the human blood stream and each adult P. terribilis contains nearly 200 micrograms."

darkroastedblend.com, flickr and Zoltan Takacs, Amy Snyder, Juan Manuel Renjifo

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