The oldest U.S. Government building in California, and it's State Historic Landmark #1.

A massive volcanic plug is now a protected area that hosts a number of bird species.

The oldest burial ground in the city, final resting place of city founders, Ohlone natives and murderers alike.

The remains of a 12th-century chapter house in Golden Gate Park.

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

Golden Gate Park's historic collection of plants.

An essential stop before plundering, BYO Cutlass.

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

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

A hidden subterranean installation offers a view of the sky.

Art in the form of a winding, man made crack in stone.

A six-story treehouse offers spectacular views of New York's Finger Lakes region.

One of Frank Lloyd Wright's greatest—and favorite—architectural masterpieces was almost lost.

Memorial of the Salem witchcraft hysteria in the town of Danvers, where it all began.

Located just behind a quiet residential neighborhood, this is ground zero for the Salem witchcraft hysteria of 1692.

A monument to the military service of America's greatest traitor refuses to even name him.

The birthplace of the alleged inventor of baseball.

A beautiful multicolored mound formed by the mineral deposits of the Orenda Spring.

Two mermen, eternally spitting into each other's mouths.

A sudden forest of traditional Papua New Guinean art works is hidden in a corner of Stanford University.

Rodin's famous depiction of Dante's 'Inferno', amidst a sculpture garden of many of his other works.

Sitting atop San Francisco's tallest hill, a cross honors the victims of the Armenian genocide.

A promotional sun clock on the site of San Francisco's great raceway.

This controversial depiction of the "Founder of California" looks as though it was sculpted from mashed potatoes.