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

A slice of central Asia in the middle of Berlin.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

An eerie, derelict amusement park in Berlin.

A neighborhood church's unusual abstract stained glass was the final project of avant-garde artist Jean Cocteau.

The last bastion of Roman presence north of the Alps looms over a German town.

A self-funded cemetery with a long list of inhabitants.

Brisbane's manmade urban beach has enough water to fill five Olympic-sized swimming pools.

WWI hospital ship lost in a cyclone turns up on the coast of Fraser Island, where she remains rusted and forgotten.

The only pollutant in the clear blue water is sunscreen.

This one has sailed five times as far as Sir Francis Drake's famous ship.

Lovers proclaim their unbreakable bond by leaving their names on locks fastened onto the Shoreditch fence in East London.

A community of artists and entrepreneurs seeks a simpler life on London's waterways.

Bronze sculpture celebrating the relationship between Churchill and Roosevelt.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

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

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

Spitalfields' regal market goat is said to be a monument to the area's migrant population but most are pretty sure it's just a goat.

Ship-sized kinetic sculptural fantasy.

An unusual round church in London with a Templar past.