Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

Cozy basement bar sports an inventory of over 2,000 beers.

Climb inside an iron crystal magnified 165 billion times its normal size.

Lavish royal estate punctuated with heated greenhouses.

If you've ever wanted to tear Hello Kitty apart with your teeth, this is the place.

A pair of trees near a Hong Kong shrine are said to grant wishes, but only the ones they hold on to.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

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

A haunting collection of the vanished and disappearing natural world.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

Paris' linguistic guide to the international language of, yes, love.

A museum of carnival attractions where you are invited to ride the rides.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

This massive library holds what was once the largest book collection in the world.

Abandoned railway line circling the city of Paris.

Notorious artist squat renovated into legal studios.

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

Teeming with illegal goods and services, this towering maze of vice is also a popular tourist accommodation.

A serene space tucked amid the skyscrapers of Hong Kong's bustling financial district.

This naval gun is fired every day at noon, an odd timekeeping tradition the origin of which is local legend.

In Hong Kong, a fairytale flower tunnel is hidden within the gardens of a public housing complex.

Remnants of the most densely packed city in world history, that thrived on anarchy for 30 years.

A colossal floating restaurant built to look like a ancient Chinese imperial palace.