A hidden courtyard houses early 20th-century plaster masterpieces.

Built for an exposition in 1915, these horticultural displays have stood the test of time.

One of the largest trees of its kind in California.

This little blue house pokes out over the campus of UC San Diego, seven stories high.

A quirky bookstore hidden beneath a sea of whitewashed Greek villas.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

The hallucinogenic center of the ancient world.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Monasteries on rock pillars, once accessible only by frayed ropes.

A futuristic-looking beach house built for the owner of a snack food brand.

The world's largest outdoor organ is played weekly by one of just two civic organists in the U.S.

Lucha Libre (Mexican Wrestling) themed taco shop.

A couple turned their front yard into an artistic masterpiece.

One of the few remaining carousels built by master amusement park carver Charles I.D. Looff.

San Diego's most historic and haunted home.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

An inconspicuous footbridge beloved by San Diego locals.

Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.

A simple but powerful tribute to the 20 victims of the 1692 witch trials.

Experience the hysteria of a 17th century witch hunt through goofy reenactments and wax dummies that should probably be burned at the stake.

Memorial to a beloved puppeteer as well as all street performers.

A three-piece musical sculpture installed between the subway tracks at Kendall Station near MIT.

This massive World War II calculator hearkens back to the days when "computer" was a job title.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."