100-year-old shipwreck you can walk up to at low tide.

The lost ruins of the forgotten ferry lie hidden beneath the silt.

Adobe ruins punctuate the beauty of an 800 foot canyon carved by the Canadian River.

This isolated outpost was once the only place to cross the Colorado River for hundreds of miles.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

A monument to the one-armed geologist who led the first documented expeditions through the Grand Canyon.

A medieval wash house where people washed clothes in a river allegedly formed by the tears of a mourning nymph.

These aggressively sustainable art homes look like something out of 1970's science fiction.

A multi-storied adobe complex has been inhabited for more than a thousand years.

One man’s passion for gas stations is on display along the Rio Grande in northern New Mexico.

A preserve with 75,000 ancient drawings remains the realm of public – not just scientific – exploration.

This museum started as a collection of Manhattan Projects and continues to add exhibits as they are declassified.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

The second building of its name to occupy this location might be the finest flatiron building in San Francisco.

A modest reminder of treacherous waters at the Golden Gate.

Created in 1972, the famous sculptor's intricately detailed monument to San Francisco is overflowing with city landmarks.

Once the largest windmill outside of Holland, with enormous 114 foot sails.

A man-made island in scenic San Francisco Bay.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

San Francisco's newly reopened hands-on science museum.

A collection of memorabilia from the Beat era in the back of a San Francisco bookstore.

Nestled in the heart of San Francisco’s bustling Financial District stands a unique homage to the Mayan and Beaux Arts.