The scuba diving training facility was named for the steam that rises from the cave's chimney.

One-time winter retreats of prolific inventor Thomas Edison and his friend Henry Ford.

This small museum concentrates on the juicy history of orange production in Florida.

The futuristic test model of an iconoclastic visionary who wanted to redesign the world.

This ancient hydrological marvel is now the base of a modern outdoor cinema.

The final resting place of the "father of special effects."

The forest that inspired Winnie-the-Pooh's Hundred Acre Wood can be found outside London.

England's most notorious suicide spot.

High winds can make this one scary landing.

New Zealand's only running funicular railway.

Edoras, capital city of Rohan in Lord of the Rings, once sat atop this isolated New Zealand mountain.

A galaxy of glowworms—larvae of a gnat—hides deep in the belly of these caves.

The explorer Captain Cook may have named it White Island, but the Maori call it Te Puia o Whakaari – The Dramatic Volcano.

These phallic stone spires once served as Tolkien's Paths of the Dead.

Tubing through a cave lit with glowworms is a magical underground experience.

A solitary tree has grown up all alone on Lake Wānaka, backdropped by the beautiful Southern Alps.

A perfect turquoise lake colored with glacier dust.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

An architectural marvel that spans the Arda River, and has stories of a haunted past.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

The span is crooked and made from two older recycled bridges.

This robust fence in front of a historic Georgetown home is likely made from hundreds of recycled Revolutionary War firearms.

The famous abolitionist’s preserved estate is one of Washington's finest monuments to its great Black citizens.

The Byzantine, pre-Columbian, and medieval art at this stately mansion are some of the most under-appreciated collections in D.C.