A middle school sports field that many believe was the true location of the first successful powered flight - and not by the Wright Brothers.

The modest home of the very immodest dancer who cost a king his crown.

Established in 1853, this crumbling cemetery sits forgotten on the corner of Church and Chapel in Gold Country.

The oldest continuously operating Catholic school west of the Mississippi.

California's oldest existing theater building hosted an impressive cast of celebrities, including hosting Mark Twain's first lecture.

A four paneled, brightly multicolored mosaic adorns the side of this popular grocery store.

A modern mechanical planetary system, part of a 10,000 year clock.

Visible below the waves are memorials to the city's Gold Rush dead.

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

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

Since 1973, this block has been home to the most concentrated collection of murals in San Francisco.

This antique shop specializes in the history of print and design.

This contorting sculpture is the tallest in San Francisco.

This museum explores the history of the book, from scrolls to mass-produced objects through tools, stories, and massive cast-iron binding machinery (some of it operational).

Where a demonstration led to equal rights for one of California's most marginalized communities.

A walk down memory lane in the heart of one of San Francisco's most notorious neighborhoods.

27-room home built with the fortune of a sugar magnate.

A classic advertising icon immortalized in regal bronze.

Prone to disastrous fires, the city of San Francisco has the Guardian, a fireboat gifted by residents, to watch over them from the bay.

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

These six walrus head statues harken back to a time when this area wasn't far from the oceanfront.

A shining, cold, black organ lies in San Francisco's financial district.

Its buzzing collection honors vibrator history.

One of the last remnants of the city's Chinese nightclub scene is now a dive bar selling killer mai tais.