Three abandoned missile silos are hiding in plain sight behind a suburban development in Maryland.

Visitors dating back to the 1600s carved their marks in the stones of the iconic tower.

This romantic, decaying 13th-century ruin on the edge of Sherwood Forest is reputedly one of England's most haunted places.

An abandoned Soviet-era mining town in the mountains of South Kazakhstan.

The final remnant of the Arkansas zinc industry is this historically protected ghost town.

The ruins of a medieval castle linked to the murderous French lord that inspired the famous legend of Bluebeard.

A gaudy painted elephant stands in memory of south Florida's fallen carnies.

A headstone notes where the most famous of Robin Hood's legendary Merry Men is reportedly buried.

The decaying remains of a 1960s mechanical wonderland that never officially closed.

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

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

This dig site outside D.C. is known for its exceptionally high density of baby dinosaur fossils and dinosaur eggs.

Bloodstains can still be seen in this medieval church where two medics saved lives on D-Day.

This chain of artificial lakes was an ideal test ground for the aircraft that would carry the "bouncing bombs" used by the WWII "Dambusters" squad.

A once-luxurious, now abandoned hotel in the Italian Alps.

An abandoned 1920s school with a mysterious history.

This abandoned school has had many lives since the early 1900s, and all of them doomed.

Opulence and fantasy collide in this royal chair which is supposedly made with unicorn horns.

Museum on earth sciences featuring a recreation of a famous curiosity cabinet.

Pre-Nazi swastikas adorn the sculpted pachyderms flanking this brewhouse portal.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

Copenhagen's celebrated theme park and gardens.

The largest bottled beer collection in the world holds over 22,000 unique beer bottles.

The final resting place of two (or three) presidents, one vampire, and 18,000 Confederate soldiers.