Where monkeys run wild and the humans are caged.

Florida's oldest bar was once a morgue, complete with a hanging tree and gravestones.

This statue inspired by Renoir's famous painting embodies the jovial spirit of Key West.

A historic presidential getaway on the continental United States' southernmost island.

The highway's southernmost spot is a beloved local attraction.

A monument celebrating the idea of reaching inaccessible places.

The island residents are known for taking their quirky sense of humor with them to the grave.

"We Seceded Where Others Failed."

A tribute to the intrepid explorer and his crew who perished in terrible conditions on an ill-fated expedition to the Arctic.

A student driver's nightmare.

Catacombs turned marketplace.

Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

Floating man-made island and upscale restaurant.

This shop specializes in oddities and Victorian-inspired wonders.

Approximately 250,000 people left homeless by the great earthquake and fires found shelter in Golden Gate Park.

Created in 1972, the famous sculptor's intricately detailed monument to San Francisco is overflowing with city landmarks.

The largest whiskey stash on the West Coast survived the 1906 fires--but not without heroic effort.

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

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

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

Since 1973, this block has been home to the most concentrated collection of murals in San Francisco.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

An overlooked and unassuming engineering marvel.