The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

This museum houses an imposing skeleton army comprised of creatures great and small.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

France's most famous cemetery, with some of its most curious tombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

Museum celebrating the achievements of the Soviet space program.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

A unique museum dedicated to culture and artistry of carpet weaving.

Legend says this sacred tree was a gift from goddess Athena.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

The oldest cemetery of modern-day Athens blends the modern and ancient worlds.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

This hidden green space is the city's second largest conservatory.

A recently restored Shoreditch landmark with ties to Jack the Ripper.

Where's a guy to go after a long, hard day at work?

The Columbia Road Flower Market is now open every Sunday, rain or shine.

A museum wholly devoted to juvenescence.

A flourishing garden with pigs, donkeys, goats, rabbits, guinea pigs, chickens, ducks, and sheep.

A historic arboretum and non-conformist, non-denominational park cemetery.