Xul Solar was an artist of alternate worlds, inventor of languages, and dreamer of utopias.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

A gateway to a mysterious network of underground tunnels.

This historic, palatial theater is now one of the world’s most beautiful bookstores.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

Rebuilt remains of a temple to Roman god Mithras.

An unusual round church in London with a Templar past.

An small and easily overlooked archaeology museum chock full of Egyptian artifacts.

Tombstones and enigmatic inscriptions hide within a vault beneath a popular London arts venue.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

This pub boasts a curious history and may have inspired a Dickens character.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

Middle-earth in the middle of Switzerland.

This medieval footbridge in the Swiss Alps is known to attract cliff-jumping daredevils.

Hidden in the garden of physicist Erwin Schrödinger's house is a life-size figure of a cat from his famous thought experiment.

A permanent exhibition honors Queen, which recorded seven albums at the casino-based studio, including “Under Pressure” with David Bowie.

Large Hadron Collider and the Birthplace of World Wide Web.

Standing stones found on a construction site are re-erected.

The largest underground lake in Europe.

This statue pays tribute to the iconic musician in the place where he recorded his final studio album.

Abbey built on the ruins of Roman catacombs.

A Swiss amusement park entirely dedicated to the theory of ancient astronauts.

A 200-year-old tavern challenges guests to finish a glass of wine while hanging from a ceiling beam.

Enormous, fluffy dogs frolic around this museum dedicated to a legendary Saint Bernard.