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

Olfactory delights in San Francisco's Botanical Gardens.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

A 140-year-old castle with underground caves hidden in San Francisco.

The largest drain hole in the world.

A trash dump made beautiful by nature's power.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

Canyon walls shrouded in ferns.

An exotic wildlife habitat right off The Strip.

One of the most remote spots in America and the first protected wilderness area in Nevada, named after an old legend.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

An abandoned lot littered with concrete debris was once the home of the world's first female railroad president.

The Empire Mine is "one of the oldest, largest, deepest, longest and richest gold mines in California."

This fully intact Neoclassical-Greek Revival style firehouse operated until 1938.

A watering hole where the options for seating include a bar, patio, or subterranean cave.

"You don't need a rocket scientist to build a steam engine, but we've got one." -Museum docent on the credentials of a restoration volunteer.

A unique solar-powered pottery studio and gallery in the desert.

The beauty and the beast of hydraulic mining is on full display at this California Historic State Park.

This Nevada lake holds its titular natural pyramid and, if the legends are true, a number of dangerous spirits.

Beneath a Virginia City bar is the entrance to an abandoned gold mine.

This cave was hidden for thousands of years, storing the worldly goods of ancient Native Americans.

This railroad magnate's 19th century tower is more than a little bit out of place in the Nevada desert.

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.