A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

An ancient octagonal weather station named for the eight Greek gods of wind.

This small museum once served as a royal hunting pavilion for King Otto Friedrich Ludwig.

This building displays the scars of the “Dekemvriana,” a dark time in modern Greek history.

This graffitied 19th-century building was a prototype of European industrial architecture.

The oldest standing Byzantine church in Athens is tucked within a monastery in the middle of an upscale shopping district.

The oldest cemetery of modern-day Athens blends the modern and ancient worlds.

Art from the latest counter-culture; kids who dye their hair blue and believe the future will be a post-apocalyptic water world.

Thirteen trees representing the original thirteen colonies were planted with soil from historic Revolutionary battlefields.

Only hotel where you can legally launder money.

A pair of mutilated bronze octopuses slump at the base of the monument honoring California's admission to the U.S.

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

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

This private residence was the template for one of the most beloved television homes of all time.

Golden Gate Park's historic collection of plants.

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

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

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

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

An iconic location along the Los Angeles River where countless movie scenes are filmed.

There are lots of hands and feet stamped in the cement in front of Grauman’s Chinese Theater, but Mel left behind something extra.

This forgotten Frank Lloyd Wright house is an architectural marvel at the end of a sleepy residential street.