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

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

A huge musical instrument played by the ocean.

An artsy hidden staircase leads to breathtaking views of San Francisco.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

One of few lasting examples of the brief octagon craze that developed into folly.

This colonial town in Colombia sits around the largest stone paved square in South America.

This whimsical home made entirely from clay is basically a giant piece of pottery.