Take a dip in the world's largest mineral hot springs pool.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

This Chinese-style quartz sundial was saved in its final hour.

Travel through the wholesome amusements of yesteryear at this charming miniature village.

Climb to the top of this spiritual tower, and you'll be rewarded with spectacular views.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

This spectacular track has run continuously since 1882.

When ecosystems collide in the arid Southwest.

The highest bridge in America was built for an almost unnervingly small amount of money.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

An eight-foot-long pine cone made out of 140 recycled steel shovels is an homage to Maine's state flower.

This massive chalk hill carving is one of England's most beloved giant horse geoglyphs.

Famously misunderstood wonder of the ancient world

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

The longest living non-clonal organisms on Earth.

A gothic palace of endless stalagmites and pseudoscorpions waits within one of the world's most beautiful caves.

Designed by Horace Trumbauer in 1893, this Gothic-style castle is now a home for academics.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.

A giant telephone commemorates the last "crank" call ever made in the U.S.

A showcase of geologic history is home to one of the largest collection of lunar meteorites on Earth.

The world's largest rotating world.