One of the oldest producers of hand-folded fortune cookies still uses its original secret recipe.

A hidden subterranean installation offers a view of the sky.

A still functioning vaudeville carousel that has operated for over a century boasts a colorful menagerie and past.

Golden Gate Park's historic collection of plants.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

An essential stop before plundering, BYO Cutlass.

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

Tiki luxury on Nob Hill.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

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

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Every equinox this Maya pyramid puts on a spooky ancient light show.

A mysterious, abandoned Chinese building in Mexico pays homage to the area's East Asian immigrants.

If you can look past the nearby sewer pipes, this urban sinkhole grotto is a mini-paradise.

A house mixing elements of Chinese and Mexican architecture stands as a tribute to the Chinese-Mexican bishop who lived here.

Its sunny hues are believed to have inspired the town's color palette.

These mosaic designs promise a cure for headaches, toothaches, and colds.

Iconic red and white plaques show the creative names invented to navigate the city streets.

A classically inspired temple in Redwood City.

A shape-shifting buy-sell-trade bookstore, born to Beatnik Era spirit.

Handmade treasures from around the world.

Spiral labyrinth hidden in the hills above Oakland, CA.