Northern Ireland's Brobdingnagian stepping stones.

A 30-acre garden inspired by the principles of modern physics.

This stately estate house features a tower covered in a bright, modern mural.

One family's environment-friendly hobbit-house in Wales.

Three bridges straddle a stream, one stacked upon the other.

A rocky sea serpent hides caves, blowholes, and a spectacular natural bridge.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

This striking art museum holds an amazing series of curiosity cabinets.

This freshwater spring fills with 10,000 gallons of water per minute.

Former self-sufficient mental institution now a planned community.

Moonbows over Kentucky.

A turn-of-the-century architectural marvel built on healing mineral springs and salt licks.

America's post-nuclear-attack chambers of Congress.

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

A take-out restaurant that only serves cuisine from countries with which the United States is in conflict.

Deep scars on the earth left by the Ice Age.

Prison made famous by The Shawshank Redemption has been out of commission since 1990.

This long, dark tunnel is open to hikers, but those without lights are known to get confused even on the straight path.

Seattle's own bad art museum located inside Cafe Racer.

A wall of chewing gum moonlights as collective art.

42nd story Pyramid shaped penthouse tops Seattle's oldest skyscraper.

The largest earthwork effigy in the world.

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

The largest ancient burial mound in Ohio.