A toxic ghost town sitting atop a massive coal fire.

A 19th century library favored by Edgar Allan Poe and H.P. Lovecraft, known by locals as "the Ath."

A vast array of tropical plants collected by a vacationing couple.

Human skulls and a stuffed goat made into a rocking chair can be found at this strange little store.

The highest point in Delaware is located under a trailer so this marker across the street will have to do.

A scenic fort on the harbor protected Philadelphia from an attack that never came.

What began as an art installation is now the private drinkhaüs for a brewery's employees.

Museum houses an impressive display of the origin and artistry from the now-quaint invention's history.

This Fifth Avenue church has long been the favored worshiping place of Broadway actors and vaudeville performers.

A 19th-century politician who died after walking home in a blizzard is honored with this Manhattan statue.

A Manhattan courthouse hides a small but scathing memorial to Holocaust injustice.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

World's first "penitentiary," meant to be humane, drove men insane.

An Irish Memorial commemorating those who perished due to potato blight.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

This tiny patch of arid sand sits in one of the greenest states in the United States.

The world's largest rotating world.

A strange mark in the stone fence of a cemetery fabled to have been made by the Devil himself.

Possibly the smallest church in the world floats in the middle of a pond.

Celebrating the greatest pugilists the world has ever known.

Abandoned rock quarry now a haven for mountain bikers and hikers.

This Art Deco fortress in upstate New York gives Manhattan's vaunted examples of the style a run for their money.

An octet of classic chrome trailers speared into the ground act as a tribute to the silver bullets of the open road.