An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

California's most comprehensive horticultural library.

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

Golden Gate Park's historic collection of plants.

San Francisco’s condensed garden of incredible plant growth.

This turn of the century masterpiece has a mysterious goaty interloper.

The oldest lawn bowling club in the United States.

A famous alternative culture epicenter and where Joplin serenaded young hippies.

This shop specializes in oddities and Victorian-inspired wonders.

Gold Rush-era tombstones line the park's paths.

An overlooked and unassuming engineering marvel.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.

A Wild West jailhouse that slid down the mountainside.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

This shallow cave got its name from copious amount of human bones found inside.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

FIFA deemed this isolated field one of the most remarkable places to play the sport.

The old tradition of drying laundry on poles in the public green is still guaranteed by Glasgow city law.

Hidden on a cobblestone street in Glasgow, a Czech Cajovna-inspired teahouse serves as a hangout for Bohemians.

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.

Glasgow’s piece of the patron saint of love.

Early Medieval stones sit on display at the beautiful Govan Old Church in Glasgow.