Couple's personal collection of pinball machines turned public pinball museum.

This beautiful landscape is the only Sichuan-style garden outside of China.

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

An outdoor sculpture park of giant pink robots and post-apocalyptic Christmas scenes.

Instead of faces, these sculptures have barcodes—statements on societal dehumanization.

This inanimate goat created by the "welding nun" has been helping to clean up the city of Spokane for more than 40 years.

This unique Seattle structure was designed to be the greenest commercial building on the planet.

The final resting place of the first documented Chinese person in the United States lies in a Boston cemetery.

This park celebrates a sister city relationship that survived the Cold War.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Now housed in a museum, this giant pink elephant stood in downtown Seattle for more than 60 years.

Outside this souvenir shop is a statue of Bigfoot composed of volcanic ash, and plenty more to see inside.

This downtown Dallas art installation is always on the lookout.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

This semi-secret garden in south Seattle emulates a traditional Japanese garden using the plants of the Pacific Northwest.

This Puget Sound military post has a long, turbulent history as a gateway to the Pacific.

In the shadow of a former battleground, the resting place for nearly 2,000 soldiers who died in World War I.

This long, dark tunnel is open to hikers, but those without lights are known to get confused even on the straight path.

A colorful statue honoring the local salmon in glass and bronze.

A popular European tradition makes its way to the states on one of America's most famous bridges.

A tunnel with windows, so you don't miss out on the impressive views.

Thirteen pastel palaces in downtown Charleston add a gorgeous splash of color to the city.

Where the famed daredevil attempted to launch himself across a canyon in a custom-built rocket.

A bronze replica of half-consumed salt lick honors a quirky town tradition.