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

Commercial aircraft storage facility, where you can see a TWA 747.

Once disputed as the largest sundial in the world.

These petroglyphs created by ancient Arizonians have withstood centuries of exposure to the elements.

Pillars made of 700 pieces of luggage climb to the ceiling of Sacramento Airport's baggage claim.

Eccentric sculptures made from repurposed materials peppers this former farm.

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

The historic building's ornate stained glass fixture has survived the devastating 1906 earthquake, ensuing fires, and multiple redevelopment attempts.

The second building of its name to occupy this location might be the finest flatiron building in San Francisco.

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

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

The first fresco Diego Rivera painted in the United States can be found in the former San Francisco Stock Exchange.

One of the oldest producers of hand-folded fortune cookies still uses its original secret recipe.

A poignant memorial to a young boy whose death spurred a dramatic increase in organ donations in Italy—dubbed the "Nicholas Effect."

The only parking meter in the entire town, it is surrounded by 100 free spaces.

The timepiece that exonerated a labor radical accused of a parade bombing that killed ten people.

California's own majestic geyser is powered by a subterranean volcano.

The fossilized remains of ancient California redwoods.

A public art installation featuring clawfoot bathtubs on stilts sparks admiration and controversy from locals.

A huge work of Burning Man-inspired outsider art on the grounds of a California winery.

A beer pipeline runs beneath Bruges.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

The Netherlands' first car tunnel has an unusually rectangular shape.