The first AIDS memorial chapel in San Francisco and one of only a few in the U.S.

This painted marvel is San Francisco's 400-foot ode to urban biking.

For nearly 50 years, this San Francisco nonprofit has been serving as a mix of recycling center and art school.

This colorful boulder serves as a canvas for political statements and artistic expression.

An overlooked and unassuming engineering marvel.

Floating man-made island and upscale restaurant.

Early prototype for Frank Lloyd Wright's Guggenheim.

Once the largest windmill outside of Holland, with enormous 114 foot sails.

A pair of mutilated bronze octopuses slump at the base of the monument honoring California's admission to the U.S.

The neighborhood church casts a breast-shaped shadow that locals have come to call the “two o’clock titty.”

This Alamo Square mansion is rumored to have hosted satanic rituals and other occult practices.

The tea room that pushed the boundaries of adorable straight into... we can't find the words.

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

A bust of the entertainer and politician sits in an alcove at the Palm Springs Airport.

Through the decades, Black music stars have performed at this historic hub for music and the arts.

The first memorial dedicated solely to the Black troops who fought for the Union.

Sit where JFK proposed to Jackie or where Nixon dined on meatloaf at this storied pub.

This ancient market is often referred to as the oldest shopping mall in the world.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

New Zealand's only running funicular railway.

A second generation sun-powered marvel lights up the night.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Go inside to really appreciate this 500-year-old technological masterpiece.