A miniature rainforest is growing inside of a Midtown Manhattan office building.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

Try not to get slimed in Tribeca.

Elevated freight railway turned wildly successful urban park.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

Tucked in the back of this amazing antique store is an important piece of medical history.

A crumbling hospital from the 1850s on Roosevelt Island.

A terrific purveyor of natural history objects and curios.

The sign at the garden gate reads: "These Plants Can Kill."

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.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

Abandoned ship reimagined as a street art canvas.

During this yearly Welsh swimming race, competitors tread through the fetid waters of a bog trench.

The world’s only museum dedicated to baked beans.

Where, exactly, the great aviator completed her transatlantic flight has caused some trouble in Wales.

This former military airfield's claim to fame came from a lucky accident during the Second World War.

An unexpectedly extraterrestrial room in a former Victorian resort club.

An abandoned quarrying village turned commune is now a hub for learning the Welsh language.

A Welsh sheep farm provides daily (non-sheep) meals to red kites, producing dazzling displays of aerial acrobatics.

Quirky Welsh observatory unites art and science.

The world's largest prehistoric copper mine had 30,000 animal bones scattered throughout the maze of passageways.