Tiki luxury on Nob Hill.

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

A hard-to-reach oasis in a desolate corner of Death Valley National Park.

Travelers leave tea kettles in a remote part of Death Valley as part of a mysterious, decades-old tradition.

The rocks in this arid basin leave trails of movement behind them.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

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

A self-built castle made by a mysterious man.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

This naturally-sourced hot spring is now home to a clothing-optional resort.

Olfactory delights in San Francisco's Botanical Gardens.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

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

A beautiful geyser under environmental threat.

Its buzzing collection honors vibrator history.

This shop specializes in oddities and Victorian-inspired wonders.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

A winding path built in secret on the edge of the continent.

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

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.