This former coal gasification plant found a curious second life as a popular public park.

The largest permanent Monopoly board makes one of the longest games even bigger.

One of the largest-ever mental hospitals now sits abandoned, surrounded by 25,000 unmarked graves.

One of the oldest living oak trees in the Southeast.

A picture-perfect town, perfect for blowing up.

Outsider art meets paleontology at this roadside reptile repository.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

An unfortunate geological resemblance to Satan has labeled this Pasadena gorge as a passage to the underworld.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

One of the last Jazz Age "Wonder Theaters" in New York City.

A tiny red pebble marks what may be the quietest outdoor spot in the United States.

A replica that won't float away.

An inconspicuous footbridge beloved by San Diego locals.

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

Finale of "William Tell Overture" can be heard as drivers pass over grooves in the road.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

An homage to everyone's favorite prehistoric cartoon family.

This small-town Connecticut restaurant gives each diner a free book from its vast library.

A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.

Brightly colored 30-foot-tall totems light up the desert sky just outside Las Vegas.

This maze-like slot canyon is a unique gem within an already fascinating geological area.

Rare recess caves fill this unbelievably beautiful Ohio park.