An emerald-green grotto just a short trip from Austin.

The real life Hobbiton, this sheep farm has been forever transformed since being built for The Hobbit film series.

Peace Park and the Atomic Bomb Dome.

A haunting collection of the vanished and disappearing natural world.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

The ancient tomb acts as a calendar that keeps perfect time.

Modern sundial uses ancient methods to tell time and date perfectly.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

The world's second-largest sundial, made entirely out of stone.

The most alien-looking place on Earth.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

Want to build a wind turbine? Secede from the nation.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

A cruise terminal that changes the atmosphere of Red Hook's industrial waterfront.

The engineering feat of the Panama Canal was possible in small part thanks to materials developed in this humble Red Hook foundry.

An ancient Viking village in North America that predates Columbus by 500 years.

"A hideous albatross in the Hudson River Valley."

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

An unrealized dream to wirelessly electrify the entire Earth.

100 massive sculptures in the Hudson River Valley.

A reservoir of vintage pinball machines and arcade games for the nostalgic and thrill seeking.