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

The miraculous hydrant that saved the Mission District in 1906.

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

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

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

An easy-to-miss plaque marks the building that first held this 19th-century telephone innovation.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

A huge musical instrument played by the ocean.

Mass Grave of 48 colonists killed in a raid by Native Americans and the French in 1704.

More than 200 unconventional musical instruments that anyone can play.

The only depiction of Abraham Lincoln holding a weapon, and the names of all 9,000 Cuyahoga veterans of the Civil War.

A bronze monument to Cleveland's favorite, fastest son.

This steamer is known as "The ship that built Cleveland."

Marvel at this turn-of-the-century masterpiece that has been turned into a rather stately supermarket.

Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

The heroic sled dog of the 1925 serum run is preserved in taxidermy.

The home made famous by the 1983 holiday classic is now a perfectly preserved shrine to the movie.

Recovered suit of a cannibalistic West African gang.

The 28-foot granite map plots the locations of 40 theaters in New York City.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

A semi-scholarly approach to sex.

Elevated freight railway turned wildly successful urban park.