A pair of pure white felines guard the entrance to a spot of California real estate established as an artist's haven.

One of the largest trees of its kind in California.

The world's largest outdoor organ is played weekly by one of just two civic organists in the U.S.

This futuristic bridge is one of the longest self-anchored pedestrian bridges in the world.

Every weekend, people gather here for a brief chance to see their loved ones on the other side of the United States–Mexico border.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

This Great Plains museum pays tribute to both the prosperity and tragedy of the North American fur trade.

America's largest man-made forest was planted in an effort to bring back the past.

A rancher expanding a natural spring for his cattle came up with bones – lots and lots of them.

When an ancient supervolcano erupted, some of Nebraska's prehistoric animals were forever preserved in ash.

Site of the 1879 Cheyenne Outbreak and the site where famed Sioux chief Crazy Horse met his fate.

Other-worldly rock formations and ancient fossils abound in this unique stretch of Nebraska badlands.

This erect, phallic geological spire wasn't always named so domestically.

An experimental, automotive replica of Stonehenge.

Herman Melville wrote 'Moby Dick' in this landmark 18th-century house surrounded by farmland.

The mansion home of author Edith Wharton.

A perfect replica of the beloved show's first set.

This relic of 19th-century infrastructure is one of the few remaining coal gas storage tanks in the U.S.

Golden Gate Park's historic collection of plants.

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

An extensive collection of ancient Egyptian artifacts and mummies.

The headquarters of a secretive order is also a beautifully-designed park.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.