A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

A man-made island in scenic San Francisco Bay.

Internationally-recognized arts center housed in a century-old former military barracks.

Concrete strongholds stand guard over the Golden Gate.

A working model of the entire San Francisco Bay and much of the Sacramento River Delta, complete with regular tides that change every 14 minutes.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

A raised boardwalk winds through a thicket of stunted, century-old trees no more than nine feet tall.

The "Prussian Versailles" that is as glorious today as when it was built.

Go surfing on this urban wave, "hacked" by local surfers.

There has been an astronomical clock on this spot since the 14th century.

The castle was reconstructed to fit Kaiser Wilhelm II's romanticized vision of the Middle Ages.

A little sculpture with a large wardrobe.

Human-made caves excavated to hide a secret society of wealthy pagans.

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

A whimsical bridge uses saxophones to pay tribute to two great men and the European Union.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Catacombs turned marketplace.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

This ancient oak plays host to carvings of magical elves, gnomes, witches, and other creatures prominent in local folklore.

This pub was 238 years old when it decided to revamp its image: It started serving Thai food.

A little slice of Japan and its aesthetics in London's Holland Park.

According to legend, a noble knight and a terrible dragon lie beneath this storied hill.

400-year-old garden, restored to beauty.