Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

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

These WWII-era murals were initially booed as a libelous portrayal of the American dream but have survived multiple attempts to have them destroyed.

The giant pair of sexy legs sticking out the window of this costume store have become its main draw.

A shop full of natural curiosities, carnivorous plants, and costumed taxidermied mice.

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

Tiki luxury on Nob Hill.

Only hotel where you can legally launder money.

Furniture tries to escape an abandoned building in San Francisco.

Op-art architecture designed for happiness.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

The housing complex served as an anti-fascist fortress during the Austrian Civil War.

The house that took a plunge into the facade of a museum.

A former seaside jewel built for the everyman is now simply a neglected art deco fortress.

The home of aviation trailblazers, in a remote corner of the big city.

Piano-making empire filled with 200-year-old steam machines still churning out 1,000 instruments a year.

This landmark building is now a vibrant performing arts space with musical acts from around the world.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

The crown jewel of the Queens Museum is a nearly 10,000-square-foot architectural model of the city originally built for the 1964 World's Fair.

Where one of Greenpoint's "five black arts" was practiced.

A group dedicated to promoting boating, kayaking and environmental education programs.

A drawbridge named for a potentially intersex Polish national who fought alongside George Washington during the American Revolution, and an example of "Pulaski Red".

Townhouse facade doubles as an RMS Titanic Memorial.