This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The first statue of Christ sleeping on a bench in the United States confused its affluent parish.

A little sculpture with a large wardrobe.

A technicolor place of worship for Elevationists.

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

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

A beautiful geyser under environmental threat.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

This replica of the Greek structure is in the heart of Nashville.

A fitting attraction for the corn capital of the world.

Gigantic private toy museum featuring among finest collections of antique mechanical banks in existence.

Climb inside an iron crystal magnified 165 billion times its normal size.

A psychological self-portrait in the form of a giant, segmented head.

Paths are maintained, but trees have taken over plots.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

Daily lunch spot for many of Washington, D.C.'s cab drivers.

Decades before the scandal, this staircase on the river was a literal "water gate."

Where the U.S. government kept its actual treasure, before Fort Knox.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

Home to items never before seen by the public.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.