The mayor made the declaration in 2004.

A glass display case holds the document that ended the Second World War—which one person signed on the wrong line.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

A former electric substation that was converted into a magnificent mansion.

Surprisingly delicious Asian-style hot dogs.

Dozens of rockets and missiles are on display outside a testing facility in the Utah desert.

Every drop of water in this 27-mile long reservoir was pumped up from the Columbia River using power from Grand Coulee Dam.

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.