One of the world’s largest living advertisements is made out of pine trees.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

Hidden beneath the streets of London is a secret subway that only carried mail.

The only National Monument ever to go missing for nearly 50 years then resurface in a dump.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

The seat of Buffalo government is a gorgeous Art Deco palace.

This seemingly cursed monument is dedicated to one of Canada's great war heroes.

A reproduction of earth's many biomes.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

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

A Montreal deli that was so beloved that it was allowed to circumvent their laws of language.

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.

This abandoned subway station can still be seen on regular commuter trips.

Buried beneath the New Mexico sands are believed to be millions of copies of Atari's E.T. video game.

The highest point in New Jersey is marked by a massive, if simply named, obelisk.

Once a bustling fishing port, this semi-ghost town is now more than 90 miles away from the shore.

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

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

Need to book a room at the Hotel Pennsylvania? Just dial up 6-5000.

This abandoned seaside fortress is now simply an imposing ruin being taken back by nature.

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

This collection honors the iconic, and proudly American lighter that just won't quit.

Once America's longest-manned military fort, now an abandoned hulk.

Once the most painted on object in the world, this short campus fence is well on its way to being so again.