Hidden beneath the streets of London is a secret subway that only carried mail.

A tongue-in-cheek arcade where the games are based on everyday life.

Eighty million natural history specimens call this gargantuan museum home.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

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.

Tokyo’s only Vaudeville-cuckoo clock–steampunk-Victorian curio cabinet time piece.

This quirky collection of furniture also happens to be a public art installation.

One of the best-preserved remains of "Tokyo's lost rivers."

Tragic reminders of the 1945 firebombing campaign over Tokyo still haunt this bridge.

Daikon radishes are offered to the Japanese Buddhist counterpart of the Hindu god Ganesha at this historic hilltop temple.

Stuck in a bygone era, the oldest subterranean shopping street in Japan hides beneath the popular Asakusa district of Tokyo.

The world's shortest escalator doesn't seem to have any reason to exist other than to hold a world record.

Museum showcases Japanese sexuality and some amazing ocean views.

Meet the world's longest tapeworm in a collection that really gets under your skin.

This isolated Japanese mountain village untouched by time showcases unique and stunning traditional architecture.

Go through the looking glass in Tokyo's Wonderland-themed shop.

A wall of chewing gum moonlights as collective art.

Bioluminescent firefly squid light up this Japanese fishing port.

A colorful architectural gem in Seattle's uniquely modern Central Library.

This former coal gasification plant found a curious second life as a popular public park.

This ordinary set of steps is a must-see destination for fans of a certain romantic anime.

You can still find treasures on the pebbly beaches of one of the world's oldest jade-producing areas.