Craggy concrete faces are hidden in the walls of this artificial cave along the San Antonio River.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

Two small markers remember the Alamo's feline protectors.

An abandoned, decaying sculpture garden built by an eccentric physician in the 1920s now looks more like a forgotten cemetery.

A National Historic Landmark with a scenic clock tower and park filled with deer and peacocks, plus a military museum.

Three hundred years of preserved Spanish colonial history in San Antonio.

A gorgeous garden oasis with winding paths, stone bridges, and a troubling history.

Eclectic collections, artwork, and some feline friends fill the writer's former home.

The world's first time capsule lies behind a welded steel door in Atlanta.

An unknown Hall of Fame in Jackson, Tennessee.

This homegrown adoption center offers a wonderland of feline companionship.

9,000 square feet of vintage and modern mechanical toys, dioramas & sideshow curiosities.

The restored and active Victorian-era final resting place of San Francisco.

Barely visible foundations remain where Stow Lake’s “observatory” once welcomed visitors.

An invitation-only museum of items natural and bizarre, arcane and exotic.

A masterpiece in Golden Gate Park by virtue of the artist’s debt.

San Francisco's first World's Fair, dedicated to the wonders of California.

A whimsical antique shop with a strong air of mystery, filled with items from ages, and what feels like worlds, past.

A man-made island in scenic San Francisco Bay.

Tiki luxury on Nob Hill.

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

Abortion, prohibition, religion, war, and fear all play a part in the history of this idiosyncratic Pacifica castle.

A strange house built only at night, with rumored mystic inspiration.

Elephant seals and sea lions have turned the abandoned buildings on this island into their endangered love shack.