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

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

A replica that won't float away.

A whimsical village of unique treehouses resides in a Washington forest.

Rustic natural hot springs in the deciduous rain forest.

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

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

This natural wonder drops 16 stories straight down through rare flora and streaming waterfalls.

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

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

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

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

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."

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

A favorite haunt of dinosaur loving children and hallucinogen loving hippies alike.

This frequently-photographed waterfall takes only a short hike to visit.

Where manatees are the snowbird vacationers in these balmy Florida springs.

Hollowed out cedar log tubs set in an ancient towering forest.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

An underwater city for the dead.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.