Singapore's landscaping project is home to 18 incredible Supertrees.

Sweden's first nuclear reactor, R1, can be visited 25 meters underground.

The largest collection of two headed animals in the world.

This unique exhibit "Dialogue in the Dark" reverses roles as the visionless become guides and the sighted become ‘blind.’

Week-long block party becomes a competition for the best decorated street.

Machismo turned on its head: the lady's hand goes to the dude with the bigger brain.

This annual Belgian water race attracts bathtub captains from all over the world.

An academy where anyone can train in the exciting acrobatic sports of parkour and freerunning.

The first tourist attraction to offer tours for interstellar tourists.

A nightly tradition fills the streets of Flogsta with a collective scream.

Annual convention held by the largest pyrotechnic community in the world.

Caves famous for the dragon-slaying saint who lived there.

Lost subway station nestled beneath Toronto's busy commuter line.

Cold storage for agricultural biodiversity.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

The largest of London's subterranean rivers and once a mad, bad center of London life.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

The internet as provided by a James Bond villain.

Inhospitable caverns just beneath this island paradise offer insights into alien worlds.

A town church once nearly submerged by the damming of a river is now hauntingly visible as the water recedes.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

A marvel of Byzantine engineering under the streets of Istanbul.

An enormous concrete structure built over a nuclear crater.

Montreal's colorful subway station shows its support of the local LGBT+ community.