This replica of an 8th century burial ship actually sailed to Norway before returning home to Minnesota.

A man-made island in scenic San Francisco Bay.

Once the fastest ship from San Francisco to Tahiti, the Galilee now lays in pieces in three different cities.

Half of a house.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

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

A psychedelic labyrinth on the San Francisco bay.

Created in 1972, the famous sculptor's intricately detailed monument to San Francisco is overflowing with city landmarks.

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

This teeny-tiny park built by a San Francisco man in 1962 is mostly stairs.

Faceless white figures loom over the city from the rooftop.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

Gold Rush ship-turned-hotel buried underneath San Francisco's financial district.

A Barbary Coast watering hole built into a Gold Rush shipwreck.