One of few lasting examples of the brief octagon craze that developed into folly.

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

27-room home built with the fortune of a sugar magnate.

Nestled in the heart of San Francisco’s bustling Financial District stands a unique homage to the Mayan and Beaux Arts.

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

Half of a house.

These subterranean storage areas hold emergency water reserves.

This massive mall has hundreds of shops, an amusement park, and a history of deadly amusement attractions.

Canadian centennial project designed to gather information about UFOs.

This Canadian city is actually two-in-one, even if they only respect the timezone of one side.

A surviving remnant of the thick ice mass that once mantled most of Western Canada's mountains.

Possibly the world’s easiest Easter-egg hunt.

The only road through the heart of Glacier National Park.

Fossils, railroads, and waterfalls!

A sleepy little town that had the greatest landslide in North American history fall on it.

Hoodoos, naturally eroded land formations, stand 20 feet tall in the Canadian badlands.

Live long and prosper in Vulcan, Alberta.

This massive and unusual rock formation near Okotoks is the world's largest known glacial erratic.

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

A collection of 20th-century automata, penny arcade games, and musical contraptions.

This private residence was the template for one of the most beloved television homes of all time.

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

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.