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

The ancient tomb acts as a calendar that keeps perfect time.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

A speakeasy takes on Chicago's drinking culture.

This Rhode Island mansion was a stand-in for the exteriors of Collinwood in the original "Dark Shadows" series.

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

Visitors dip into a variety of pools of what was once ice.

A modern English garden of eccentric beasts, follies, and oddities.

Iron Age "bog person" preserved for over 2,300 years.

Pompeii's less famous neighbor is still revealing her secrets.

The second-deepest known cave on Earth, hidden in an extremely remote mountain region.

Tropical paradise strewn with hundreds of World War II wrecks.

Underwater art project will double as a massive artificial coral reef to help regenerate the damaged ecosystem.

These azure waters were thought to lead to the Mayan Underworld.

Rock-cut caves and 7,000 Buddhist sculptures carved into the nearly sheer face of a sandstone mountain.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.

Patrick Dougherty's fantastic living tree sculptures, mind-blowing but temporary.

A onetime gangsters' hideaway where you can dine on steaks, fine wines, and cigars just like they once did.

Eclectic collection of rare and beautiful stones in a historic home.

Shop of curiosities with a dinosaur museum tucked in its basement.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.