A beautiful geyser under environmental threat.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

Three hundred years of preserved Spanish colonial history in San Antonio.

The only road through the heart of Glacier National Park.

Native Americans built this circle of stones, which was used to predict astronomical events.

The site of Paul Revere's historic two lantern warning.

The first American department store, and home to the largest operating musical instrument in the world.

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Commemorating the spot where the famous scientist fed his pigeons.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

20,000 pieces in a Frank Gehry-designed building.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

What was once a presidential estate is now an exotic menagerie and home to the Budweiser Clydesdales.

The Magic House provides a beautiful and creative environment for curious youngsters to get their knowledge on.

400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

When ecosystems collide in the arid Southwest.

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

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

A fitting attraction for the corn capital of the world.

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

An experimental, automotive replica of Stonehenge.

The Bucyrus-Erie model 1850B electric shovel, or "Big Brutus," the largest existing electric shovel in the world.