A walk through the historic city center, under the streets of Seattle.

42nd story Pyramid shaped penthouse tops Seattle's oldest skyscraper.

A wall of chewing gum moonlights as collective art.

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

The Flatiron Building's storied West Coast cousin is a lot more into religion.

Bonsai garden in Oakland is curated by the first non-Japanese female bonsai master in the United States.

A massive ultra-modern church presents a science-fiction view of Catholicism's inclusive future.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

A hot dog stand where the heads are just as hot as the dogs.

Kwanu'sila the Thunderbird has been silently watching over Chicago for more than 100 years (kind of).

A haunting statue called "Eternal Silence" has quite the reputation among visitors with active imaginations.

An enormous park-like oasis, full of famous Chicagoans’ graves.

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

A 19th-century horse lover's bequest led to the construction of this unique fountain in Chicago.

This abstract sculpture is rumored to cast a hammer-and-sickle shadow once a year.

This bronze sculpture on a former squash court marks the secret origins of the Atomic Age.

The site of the first couple's first kiss is commemorated by the most adorable presidential monument ever.

This conservatory allows a little bit of the tropics to thrive in the middle of a major Canadian city.

This mundane shopping plaza is named after a gruesome piece of flotsam.

Two graffiti towers stand like ghosts of Vancouver's World War II-era defensive outpost.

A nondescript Seattle restaurant inherited a piece of European history.

A giant Troll lurks under one of Seattle's oldest bridges.

This former coal gasification plant found a curious second life as a popular public park.

With its vaulted ceiling and gilded details, this University of Washington library would feel right at home inside an old palace.