Quite simply the largest tree in the world (by volume).

Rare recess caves fill this unbelievably beautiful Ohio park.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

This location holds the truth to what truly happened that faithful night.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

During the solar phenomenon "Lahaina Noon" this bendy, curvy sculpture forms a perfectly circular shadow on the ground.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

The awe-inspiring ship from the golden era of cruising has an incomparable history and a reputation as one of the world’s most haunted places.

A beautiful footbridge with over 2,000 glass sculptures along the walls and ceiling.

One of the largest collections of wildlife art in the United States, built into the side of a cliff in rural Wyoming.

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

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

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

Bison, America's national mammal, are staging a slow comeback in Ohio's prairie parkland.

Mausoleums, astronomy, and animatronic dinosaurs at this memorial to an assassinated American president.

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

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

The only remnant of a small mining town is an abandoned railroad tunnel that is steeped in ghostly lore.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

This simple, broken column marks the final resting place of one of America's most famous explorers.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

This replica of the Greek structure is in the heart of Nashville.

Belly up to the bar in Cowtown, don't forget to buy some boots.