This castle ruin in the middle of nowhere is a gem for wildlife enthusiasts.

In the ancient Woolley Woods, an art project promises access to new worlds.

A memorial in the middle of a roundabout marks the spot where German forces formally surrendered, finally ending World War I in Africa.

These brass bunnies honor the rabbits that dominated the no-man's-land around the Berlin Wall.

Behind medieval walls in a corner of bustling Palermo is a breathtaking former mosque once inhabited by a wolf-taming hermit.

A former factory hosts an amazing collection of Mexican marionettes.

This secret facility trained seals for the Swedish navy during the Second World War.

Not the result of an accident, hurricane, or aliens, this is an eye-popping tribute to the Melbourne tram.

Soviet intelligence had a keen interest in the Cold War linguistic school at this old Scottish airfield.

The gravestones in this lost burial ground were bulldozed and replaced with houses and a dog park.

The Greek island's old British cemetery feels like a forgotten garden.

Deceased nuns were placed on stone chairs to decompose, while the surviving nuns prayed near the lifeless bodies.

The large rock formation where the Shawnee prophet Tenskwatawa stood and encouraged his warriors during the Battle of Tippecanoe.

Stand at the center of this lakefront sundial, and you'll become part of the timepiece.

A secret passageway from World War II is now a quirky pedestrian shortcut.

This hidden sculpture garden full of Wild West art is one of San Antonio's best-kept secrets.

Centuries ago, red and white wine poured from the statue's breasts whenever a new Venetian ruler was elected.

Elegant marble and old vaults fill this historic Dutch bank turned office space.

Rainwater transformed this old quarry into a peaceful pond you won't find in most tourist books.

A startling, centuries-old subterranean marvel hides in plain sight.

The secret room where early Bolsheviks cranked out propaganda fliers on a smuggled printing press.

A rare tour of a commercial jet assembly plant, held inside one of the largest buildings in the world.

The tombstone of the founder of the lost town of Ogletown is now stuck inside a traffic median.

The world's largest human gathering is held at the confluence of three sacred rivers, one of which is mythical.