A daily replay of the experiment that proved the rotation of the Earth.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

This beloved marketplace mascot poops money and grants good luck.

Huge masonic hall in Philadelphia with lavishly themed rooms.

This elaborate towering structure was once famed for its revolutionary height.

The first American department store, and home to the largest operating musical instrument in the world.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

This tiny New Jersey village has lived many lives but seems determined to remain a ghost town.

These unassuming lighthouses have seen the first reading of the Pledge of Allegiance, the first wireless transmission, and more than one mystery.

The land is home to swimming ponies and a legendary 18th-century treasure.

A glimpse at Walt Disney's vision for a "community of tomorrow," in miniature.

Disney World's very first waterpark is now an abandoned ruin being reclaimed by the swamp.

Disney's abandoned animal island is now an overgrown ruin that was almost the coolest attraction ever.

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

This stretch of highway is said to be haunted by ghosts of settlers whose graves were paved over.

The only ancient owl carving found east of the Mississippi.

This abandoned NASA launch site is now a memorial to a trio of astronauts who were killed there.

A building so large that it has its own weather.

Mariners once used this prehistoric landfill as a navigational landmark.

An aviation relic that made coast-to-coast travel possible.

The third tallest lighthouse in America once guided author Stephen Crane to safety.

One of the largest Native American shell middens stands 30 feet tall.

Strange beasts lurking in a garden are all that remain of a quirky, short-lived theme park.