The walls of the iconic dome are hollow and have a secret stairway.

A haunting tribute to pioneering photographer Clover Adams.

The house where John Wilkes Booth conspired with his co-conspirators.

The most decorated dog of World War I is preserved in the Smithsonian.

Largest Roman Catholic church in North America.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

This Tennessee museum is dedicated to a tragic railroad hero who inspired the famous ballad that bears his name.

The crumbling ruins of this southern American fort have survived storms, war, and cults.

This New Orleans tree is filled with hidden chimes that produce a carefully tuned melody.

This two-room shotgun shack in Tupelo is the birthplace of a King.

Eight rare Corvettes are swallowed up by a sinkhole in Kentucky's National Corvette Museum.

This grave marks the final resting place of a legendary frontiersman... unless it doesn't.

This graffiti-covered bridge is the quintessential vision of a place for disillusioned youth to escape the complexities of burgeoning adulthood.

Haunting and beautiful trees, doomed to die.

Steinbeck's old stomping grounds, immortalized in Cannery Row.

This remarkably simple jail went over a century without an escape.

The first safe in this California town had to hold all the gold.

The oldest continuously operating church in California.

A tree grown from astronaut seeds which were exposed to cosmic rays.

Life in this isolated, hilltop lighthouse was lonely, but it sure was lovely.

The whimsical construction on the roof has given rise to many a Montgomery myth about its contents.

The country music legend's grave is surrounded by Astroturf because fans kept plucking out the grass.

A wealth of local folk art, antiques, and curios, without ever leaving your car.

One person's lost luggage is another person's treasure.