This psychedelic tromp l'oeil seems to be beckoning drivers to crash into a wall.

This titanic steel chain linking two buildings was installed without permission but instantly beloved.

A haven for wildlife amid the farmlands and development of the Willamette River Valley.

Multiple waterfalls and several historic CCC buildings anchor this state park in Oregon's Willamette Valley.

Ride a mechanical corn dog at the alleged birthplace of America's favorite deep-fried wiener.

Hidden in Portland’s West Hills, a 170-year-old marker literally stakes out the Pacific Northwest.

Definitely not a clown bar.

This morbid, delightful curiosity shop offers everything from animal bones to human teeth.

The Bong-area park police have asked visitors to please, stop stealing the signs.

A unique botanical garden housed in three giant geodesic domes.

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

This lakefront cottage was crafted in the 1800s and was once a sanitorium.

Home to the world's largest refracting telescope and the birthplace of modern astrophysics.

Behind a modern brick exterior lies the oldest continuously-operating lunch-car diner in the United States.

Wisconsin's most celebrated export gets the royal treatment on I-94.

An outdoor urban gallery of large-scale artworks by the world's most influential street artists.

A shining sculpture made of 3,115 lights, the number of visible stars in the Northern Hemisphere.

A Bibliophile's Dream.

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

A century-old hotspot for jazz, frequented by everyone from Charlie Chaplin to Al Capone.

A speakeasy takes on Chicago's drinking culture.

This unique zoo is the only place in the world where you can see all 15 species of crane.

A remnant of the last Ice Age, this lake is surrounded by fascinating rock formations.

Over thousands of years, this slot canyon was carved out of the bed of an ancient lake.