Quiz: Surviving Naked and Afraid

Rivers in the Balkans are largely free-flowing, unlike other bodies of water on the continent. They are home to endemic species of fish, provide habitats for birds, and a playground for watersport daredevils.

Join Discovery as we explore five of America's most extreme destinations: Denali, Alaska (highest peak); Death Valley, California (hottest, driest, and lowest); Prospect Creek, Alaska (coldest); Mt. Waialeale, Hawaii (wettest); and Paradise Visitors Center on Mount Rainier (snowiest).

We've selected 5 unforgettable hiking vacations sure to lead you into the thick of your destination.

A US Airforce bomber crashed in the mountains of Alaska during a training mission. Today, adventurous hikers can make the climb to bomber glacier to see what remains of the fuselage.

Colin O'Brady and his crew have achieved the first human powered row across the Drake Passage.

When to go, what to see, what to pack and more.

Adventure seekers travel from around the world to drive and cycle Bolivia's 43-mile "Death Road." Visit Discovery.com to learn what's so dangerous about it.

The quest for gold is never over when your name is Parker Schnabel.

Be prepared to be wowed by this unique island country.

Adventure into Victorian England with rickety bridges and vertical climbs across a 19th-century mine.