California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

Collective dedicated to restoring steam engines.

The randomness of this wall of lava lamps helps encrypt up to 10 percent of the internet.

Home to the "Circus" trees created by Axel Erlandson.

This strange seaside tower got its name from a wealthy eccentric who would hide coins among its stones.

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

A huge musical instrument played by the ocean.

Faceless white figures loom over the city from the rooftop.

A psychedelic labyrinth on the San Francisco bay.

An extensive collection of ancient Egyptian artifacts and mummies.

Pick up all of the cosmic knick-knacks under the sun or take a creative writing course, all offered in this novelty storefront.

Hordes of precariously balanced stone figures crowd the shores of the Hudson River.

The 40-year-old machine serves soda quicker than you can catch it for a mere 75 cents a pop.

This life-size bronze statue remembers the tallest recorded human in his Illinois hometown.

A fantastic array of trays and cables once whisked books over to the Capitol at 600 feet per minute.

Find out what it sounds like when doves cry at Prince's recording studio estate turned museum.

The R&B singer's modest church guarantees a religious experience, regardless of your beliefs.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

A whimsical village of unique treehouses resides in a Washington forest.

Seattle's super-sized cowboy apparel once belonged to a themed gas station that wrangled in herds of tourists.

A creepy sculpture of a decapitated head invites viewers to see St. Louis through its empty eyes.

This painted blacktop brings the classic arcade game to life.

Three small rooms at the back of the “official” church of London's clowns.

The first park built over a freeway is a brutalist masterwork.