A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

This botanical garden has been nicknamed "Alabama's Little Corner of Greece."

The country music legend's grave is surrounded by Astroturf because fans kept plucking out the grass.

The former home of the hard partying literary power couple is now one of the only museums devoted to their story.

Cadillac where country's first big star was found dead.

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

See massive fossils that are over 200 million years old in northeastern Arizona.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

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

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

This remote camping site offers incredible stargazing opportunities.

The ruins of this former mining boomtown once housed over 3,000 people. Now, the population is two.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

Two massive and unstable sinkholes are yearning to unite, and their consummation could be catastrophic.

Over 50 historic windmills whir away at this outdoor museum.

An homage to everyone's favorite prehistoric cartoon family.

Thousands of rock-cut tombs fill the cliffs of this Sicilian nature preserve.

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

The world's most active stratovolcano is almost always erupting.

A more chill but no less fascinating version of the famous ancient archeological site.

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

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

Archaeologists believe this panel of petroglyphs depicting descending sheep and other figures in Glen Canyon are 3,000 to 6,000 years old.