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

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."

Resting place of Hollywood's immortals is also site of summer film screenings.

The legendary building that needed ghostly approval before being built.

Historic house-museum dedicated to the revolutionary gay graphic artist Tom of Finland.

This star-studded Old Hollywood restaurant is where fettuccine Alfredo made its United States debut.

Most famous work of one of Frank Lloyd Wright's sons.

This weird abode has inspired everything from the "House On Haunted Hil" to a robot hunter's pad.

Established in the '60s, a family-owned tropical drink bar founded by Ray Buhen, bartender to the stars.

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

Gold Rush ship-turned-hotel buried underneath San Francisco's financial district.

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

The only Frank Lloyd Wright-designed structure in the architect's hometown.

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

Appropriation-friendly collection of books, periodicals, and more.

San Francisco's oldest operating hotel, with a Victorian atmosphere and a "haunted" fourth floor.

Early prototype for Frank Lloyd Wright's Guggenheim.

A 140-year-old castle with underground caves hidden in San Francisco.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

Hide from the tourist hordes in these relatively unknown, and unguarded lava caves.

A tunnel of hardened lava along Maui’s famous Road to Hana.