San Franciscans leave gifts and messages for the magical beings that live behind the tiny, mysterious door installed on a tree in Golden Gate Park.

Home to one of the world’s largest collections of model yachts.

A psychedelic labyrinth on the San Francisco bay.

Join the circus for a few lessons to learn clowning, acrobatics, and Chinese contortion.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

This incredible college library is a visual masterpiece of mosaic art. It also looks kind of like a giant boombox.

Named after the Goddess of Harvests, Annapurna is the deadliest member of the Eight-thousanders club.

This partially buried wreck is one of the most complete of its kind but is only revealed when the sea allows.

A playing field for a popular French past time can be found tucked away in a quiet corner of Golden Gate Park.

Perfect your fly fishing technique on their practice ponds.

A walk down memory lane in the heart of one of San Francisco's most notorious neighborhoods.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

Historic town settled in the 19th century because of its convenient location along a popular coal transport route.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

The first newspaper printed by an expeditionary force was published in this colonial mansion.

The decorations were inspired by an unlikely missing treasure.

To truly appreciate Detroit's landmark skyscraper, you have to step inside.

Though strikingly beautiful, Seattle's other railway station is now largely forgotten.

The first public building in Savannah to offer air conditioning was a luxurious cinema that still operates today.

A statue honoring 44 continuous years of greeting passing ships.

This kitschy tavern is also home to rare early editions of "Treasure Island."

A cemetery full of exquisite statuary, including a monument to a woman some say died of a broken heart.