The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

Kenyan restaurant is a carnivore's paradise, serving exotic meats at its ultimate 'Beast of a Feast.'

Monkeys lounge around at this 13th century temple.

A condom-covered Thai restaurant that is more concerned with birth control than food.

270 million year-old forest of stone.

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

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

This museum started as a collection of Manhattan Projects and continues to add exhibits as they are declassified.

A unique geological area spiked with wind-carved rocks that resemble teepees.

This concert pavilion on the shore of the Great Salt Lake has been destroyed by fire, water, and disinterest but keeps coming back.

An apocalyptic seismic event creates a deadly chain reaction that ends with a 6-mile long lake developing within weeks.

This rustic old building is said to be the most photographed barn in America.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

A beautiful geyser under environmental threat.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

A secretive collection featuring objects that were designed specifically for U.S. intelligence operations.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

At 207 feet, one of the world's longest continuous escalators.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”