For thousands of years, Native American hunters drove buffalo straight off this cliff in Montana's Yellowstone Country.

See the computer’s history revealed over the course of 20,000 years.

The residents at this Yellowstone wildlife park will certify your cooler as "bear-proof."

Creek water that starts here has a 50/50 chance of ending up in the Atlantic or the Pacific.

A beach made of semi-precious green sand on the Big Island of Hawai'i.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

Hide from the tourist hordes in these relatively unknown, and unguarded lava caves.

The southernmost point in the United States is a beautiful place to look at but a deadly place to wade in.

This Hawaiian cattle ranch acts as a museum devoted to the island cowboys that predate the wild west.

These ancient sacred grounds granted amnesty to those who managed to reach them.

A controversial memorial at the place where Captain Cook met his violent end.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

The first declared National Monument in the United States.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

Experience a charming 1930's version of "infotainment."

A 12th-century fortress containing some of Berlin's oldest buildings.

The site of a concentration camp where inmates were made to take part in one of the largest counterfeiting operations in history is now hauntingly empty.

This abandoned NASA launch site is now a memorial to a trio of astronauts who were killed there.

A building so large that it has its own weather.

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

An underground city of salt.

Guns that have been defending San Francisco since 1904.

A monument to the love people have for their pets.

Inside an old airplane hangar, friends and strangers alike play on a massive trampoline.