Destructive children, start your engines.

A haunting exhibit in a wildlife refuge center highlights threatened species and the conservation efforts needed to save them.

This icon of the Atomic Age now lays dormant.

A sacred lake composed of over 300 separate pools of highly concentrated minerals.

360-degree virtual reality chamber physically immerses scientists into their data.

The largest axe on the planet contains a time capsule that seems like it may never be discovered.

The stunning remnants of this wreck emerge from an otherworldly backdrop of rainforests.

Home inspired by the crystal rock formation of the Emerald Estates.

The wreckage still sits at the exact spot the plane crash-landed in 1945, carrying 1,000 pounds of explosives.

Sleep snuggled in a sphere suspended atop the forest canopy of Vancouver Island.

This 1967 experiment in modular architecture was designed to be a new model for urban living.

A pixel art killer whale is frozen mid-leap in this Vancouver square.

The remains of a British railway rusting in the jungle mist of a Brazilian mountainside.

The world's largest indoor go-kart racetrack is hiding in Connecticut.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

The world's largest rotating world.

A unique botanical garden housed in three giant geodesic domes.

What's a diner from the 1939 World's Fair doing in a remote Utah mountain town?

A theme park featuring a replica of Noah's Ark built to the measurements specified in the Bible.

A real flying saucer, contracted by the U.S. Air Force.

A deserted hodgepodge of experimental structures designed by nearby university students.

Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.

The island of Lanai in Hawai'i is a paradise for cats and cat lovers.

Hidden behind Lincoln's head is a 70-foot-long chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.