A large collection of motorbikes with some impressive gems.

The first artificial white water river course in North America cuts right through an Indiana city.

The longest navigable underground river in the United States is home to countless blind and albino animals.

One of the most powerful computers in the world can be visited by anyone who wants to experience more computing than they can handle.

World's second largest particle accelerator, where nature reveals its secrets.

This elaborate Hindu temple is located in a Chicago suburb, but looks like it was transported directly from India.

Built to house a chapter of the Knights Templar, this grandiose building is a relic of Freemasonry in Chicago a century ago.

A science teacher's dream.

A Bibliophile's Dream.

This shop for all your super spy needs hides an educational secret.

The only museum in the world dedicated to the history of sprint car racing, next to one of the country's most historic dirt tracks.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

See the computer’s history revealed over the course of 20,000 years.

Natural rock water slides hidden in the remote forests of northern Idaho.

An obscure waterfall that looks like something out of a fantasy novel.

This semi-secret garden in south Seattle emulates a traditional Japanese garden using the plants of the Pacific Northwest.

A huge musical sculpture and other art installations on the National Oceanic and Atmospheric Administration grounds.

One small town in the Pacific Northwest transformed itself into a Bavarian-themed tourist destination.

An exercise in patience and imagination, where Mother Earth turned common stuff into precious hidden treasures.

Mysterious ancient petroglyphs carved on a glacial boulder at the tip of Bainbridge Island.

This large Sitka spruce that appears to be floating in mid-air, has defied logic for years.