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

This awkward aquarium sculpture is one of the strangest statues in Chicago.

Huge abstract sculptures of the Puerto Rican Flag.

An actual 1957 Cadillac De Ville, encased in 15 cubic yards of concrete.

One of the largest pieces of scientific equipment ever carried on a NASA space shuttle sits in a Chicago alley.

This landmark of the Chicago silent film industry may not be in the picture business anymore but it still stands proudly.

Former bath house turns gastropub.

These abandoned grain silos and tunnels are an urban exploration dream.

The 606 is a decade in the making.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

First planned industrial community in the United States.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

This unauthorized stone mermaid was secretly carved out of public stone before being permanently preserved.

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

What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.

A giant bronze coil of feces is both a tribute to doggie defecation and a reminder to pick it up.

Historic psychiatric asylum and most-filmed location in the Great White North.

An American city stranded at the tip of a Canadian peninsula where strict adherence to the "49th parallel rule" became problematic.

The mountaintop wind turbine boasts a viewing deck — and a fair share of controversy.

Housing a morgue, rare and confiscated weapons, and autopsy remains, the Vancouver police museum displays the dark side of Canada.

Traditional 15th century Chinese garden in the middle of Vancouver.

The national park was once a plantation estate.

The iconic statue was moved to a new spot overlooking the James river after several years as a mascot for the local baseball team.

An overgrown garden stands as a grim marker of an unrealized dream.