The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

This shallow cave got its name from copious amount of human bones found inside.

A popular place to pick up prehistoric coral fossils from the time when Michigan was an ocean.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

A fountain standing as a testament to a doomed alliance.

Ancient serpentine sacrifice holder that has stood the test of time.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

This unusual rock formation looks like an apple that has been neatly sliced in half.

A gorgeous garden oasis with winding paths, stone bridges, and a troubling history.

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.

Locals dubbed it the "Owl Building" because of its bird-like appearance.

An emerald-green grotto just a short trip from Austin.

A vast, otherworldly collection of Buddhist stupas.

A series of tiny artificial islands rich with produce bob atop the surface of the lake.

270 million year-old forest of stone.

Buried in the Laos jungle is a sanctuary for bears that would have otherwise been milked to death by poachers.

This tiered waterfall is so pretty it may cause visitors to cry tears of their own.

In the world's most bombed country relative to its size, this incredible organization helps pick up the pieces.

Believed to have once stored either human remains or rice wine, thousands of mysterious stone jars lie in ruin.

Eat a meal surrounded by bomb fragments.

Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

The notorious "Hanoi Hilton" where Vietnamese colonial subjects and later American POWs, including John McCain, were imprisoned.