This hilltop park offers magnificent views and a Frank Lloyd Wright masterpiece.

This weird abode has inspired everything from the "House On Haunted Hil" to a robot hunter's pad.

This great stone guardian of the forest is a relic from the land's volatile volcanic past.

A giant roundabout made up of six smaller roundabouts can befuddle the uninitiated.

A replica of a 7th-century church hides in plain sight in the middle of the concrete jungle.

A dangling church built over a Colombian gorge.

A plaque commemorates the spot in the Oregon woods where the first-ever Geocache was hidden.

This Oregon farm is dedicated to teaching people the professional art of tree climbing.

A medieval castle in the middle of rural Texas.

The 700-year-old fortress was the site of Count Orlok's castle in "Nosferatu."

A comprehensive collection of bonsai set in a beautiful campus.

Gorgeous purple flowers drape from the world's largest blossoming plant.

This oddly placed 15th-century church is one of only six bridge chapels left in England.

Inside this Icelandic greenhouse, geothermal energy keeps tomatoes warm and growing.

The grand, column-fronted, sculpture-adorned home of the ambitious digital library.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

The only diamond mine in the world where you can keep what you find.

Europe's largest collection of matchbox designs is a fascinating exploration of the cultural history of the world.

Houses are tucked between, on, and underneath giant boulders.

You feel like you're in a forest, but you're actually walking amidst the branches and trunks of a single giant tree.

The largest of only eight working transporter bridges left in the world.

Remote, volcanic island that Darwin, Hooker, and the Royal Navy shaped into a thriving, artificial ecosystem.

Stroll through a wonderland of stupendous moss-covered trees.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.