Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Towering basalt columns, a creation of fire and ice.

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

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

Most-visited and most-photographed slot canyon in the American Southwest.

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

A reproduction of earth's many biomes.

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

Impossibly life-like natural history models created out of glass by a father and son.

Three prestigious academic collections come together to create a world-class natural history museum.

A Biblically-based Natural History Museum.

A shape-shifting buy-sell-trade bookstore, born to Beatnik Era spirit.

An extensive collection of ancient Egyptian artifacts and mummies.

A classically inspired temple in Redwood City.

Rodin's famous depiction of Dante's 'Inferno', amidst a sculpture garden of many of his other works.

The most decorated dog of World War I is preserved in the Smithsonian.

At 207 feet, one of the world's longest continuous escalators.

Home to items never before seen by the public.

The "lovely red Vega" of the legendary record-settling pilot.

A heroic pigeon that, through a barrage of gunfire, delivered a message that saved over 100 lives in World War I.

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

America's Most Wanted's set resides in this tribute to the history of crime and punishment.

You might know it as the Overlook Hotel, but the inside is not going to be familiar.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.