This natural marble cave is one of only five national monuments in Oregon.

A chance to sleep among the firs and pines of the Oregon forest.

A public fountain that spouts "health water" from a nearby spring.

The largest burial mound in the United States holds the remains of prehistoric West Virginians.

Nothing says indulgence like a 1,500-pound chocolate castle.

Pennsylvania's highest point is spotted with boulders which were pushed to the surface by nothing but cold.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

The actor best known for slapstick comedy is memorialized in his home town.

A three-story, three-dimensional hobo clown in a tutu welcomes CVS shoppers.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

An offbeat angle on the ocean viewed through an antiquated lens.

The diverse and sometimes odd cultural heritage of the Golden State is collected, examined, and displayed in this proud museum.

Santa Monica's oldest restaurant, decorated with set pieces from the Mutiny on the Bounty.

Nuclear reactor created the plutonium used on Nagasaki.

Shakespeare has been brought to life in this open air theater for the better part of a century.

Eight huge lanterns lining a city street can change color on command.

This 252 step staircase offers stunning views of San Jose.

A tiny survivor of the Donner Party disaster.

This 19th century train workshop is a treasure trove of railroad history.

I Street Bridge is the heaviest swinging center bridge in the United States.