A popular Icelandic children's story comes to life inside this cave.

A "simple-hearted artist" turned an isolated Icelandic valley into his own art museum.

This verdant, tree-lined Reykjavik graveyard is both enchanting and eerie.

The oldest church in Iceland is one of the few to feature ornate decoration.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

Iceland's "Smoky Valley" is a beautiful river that is shrouded in a constant cover of steam clouds.

The thousands of shades on display — some toxic, others impossibly rare — are a library of more than just color.

This beautiful vintage movie palace has seen little change in form or function since the 1920s.

An eccentric company offers eccentric millionaires the opportunity to have spaceflight-related experiences.

This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

Collecting 700 years of mechanical death-dealing, the NRA's sprawling gun museum is a revealing testament to the American obsession with armament.

The narrowest house in America is seven feet of pure spite.

America's first public mental health facility.

The highest point in Virginia can only be reached by passing through ponies and flowers.

This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

Heron, whitewater rapids, and urban industrialism all add to the beauty of this concrete nature walk.

A railroad tunnel that, upon its completion, was considered one of the engineering marvels of the modern world.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

Once a lonely sentinel on the edge of the Great Plains, this rebuilt trading fort offers a glimpse of life on the Santa Fe Trail.

A hotel with a rich Wild West history of miners and bootleggers.

This once-popular otherworldly landscape was formed by one of the largest volcanic eruptions in history.

Each year, teams of the world's best snow sculptors have 65 hours to create frozen masterpieces.

The site of the "Bone Wars" between two rival paleontologists during the dinosaur rush of the 19th century.