The longest living non-clonal organisms on Earth.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

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

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

The ghost town that ended up on Ebay.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

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

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

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

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.

Home to items never before seen by the public.

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

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

The United States Capitol's former columns still stand.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.