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

A lone cannonball remains lodged in the walls of the Hotel de Sens as a sober reminder of a revolution.

A Parisian exterminator's shop whose storefront displays stuffed rats hanging from traps.

The celebrated eyesore created by starry-eyed sweethearts.

The Cadillac Ranch for monster truck aficionados.

Electrical pylon in the shape of Disney's beloved mouse.

Arrr! The most authentic collection of pirate artifacts in the world... matey.

A monument celebrating the idea of reaching inaccessible places.

"We Seceded Where Others Failed."

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

The second oldest continuously operating bar in Louisiana.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

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

The site of Paul Revere's historic two lantern warning.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

A heroic pigeon that, through a barrage of gunfire, delivered a message that saved over 100 lives in World War I.

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

The site of the climactic scene from the classic horror film is now a historic landmark.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.