An enclosed rotunda at the Henry Art Gallery in which viewers can look up and see the uninterrupted sky.

Residents of Fremont in Seattle have considered it the center of the universe since the 1970s.

The tech giant built three enormous glass orbs in Seattle so employees could work inside a rainforest greenhouse.

This century-old confectioner's outlet store was plucked right out of the Seattle World's Fair.

This three-story antique market and curiosity emporium claims to be "the largest singly owned antique shop in the Pacific Northwest."

A beautiful footbridge with over 2,000 glass sculptures along the walls and ceiling.

City Council meetings still happen in this historic building, impeccably preserved on the inside.

An abandoned network of military bunkers and tunnels open for anyone willing to descend into the darkness.

The building features one of the last remaining free-floating spiral grand staircases in the U.S.

The key to turning shifting dunes into the green oasis of Golden Gate Park.

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

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

A shop full of natural curiosities, carnivorous plants, and costumed taxidermied mice.

Tiki luxury on Nob Hill.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

This blowhole is supposedly caused by a trapped monster.

This industrial area was the dumping ground for massive amounts of trash, some of which washes up as tiny bits of sea glass.

This former luxury resort in Kaua'i is now an abandoned relic.

Get up close to emus and ostriches, or buy their tasty meat.

The ruins of the castle that chemicals built.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Medicinal spa created with the discharge from a geothermal energy plant.

Housed in a memorial lighthouse, this museum relays the history of surfing, beginning with the antics of royal Hawaiian teenagers.

This unlicensed collection of fast-food memorabilia sits on the site of the first ever McDonald's restaurant.