Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

The Mighty Wurlitzer organ continues to belt out the tunes at downtown El Segundo's historic home for silent and classic movies.

A metal tree emits eerie, melodic notes on top of Lancashire's Crown Point.

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

This nine-story building can be played like an instrument.

When the rain falls, this drain system turns into a musical instrument.

A whimsical sensor instrument for Minneapolitans to play on their walks to work.

Not-so-fearsome tiny trolls live under this wooden train trestle in Portland.

Portland had a unique approach to Cold War-era protections.

A beautiful 62-acre Catholic shrine and botanical garden.

This stoic, if derpy, giant stands as a monument to Oregon's statehood and the novelty culture of yesteryear.

Beyond being incredibly fun, not much can be said about the Hole with certitude.

Tens of thousands of tiny birds swarm into one school chimney every fall.

This sandstone mansion was the home of two of Oregon's most important pioneers.

Statues of Ramona Quimby, Henry Huggins, and Ribsy the dog in the park where their adventures "really happened."

The World's First 24 Hour Coin-Operated Art Gallery!! Plastic, Styrofoam, and Elvis--If you can't get rid of it, you might as well worship it!!

Tiny horses tethered to antique rings are scattered around the city.

A sculpture of a salmon swimming through a brick building.

This public art piece proves that in Portland even reporting the weather is a thing of whimsy.

The seamy, underground secrets of Portland's criminal past.

Portlandia is the second-largest copper repoussé statue in the United States.

The magic's in the hole!

The world's smallest park was dedicated in 1948 as the only colony for leprechauns west of Ireland.

No two pieces are exactly the same at Portland's hippo-themed hardware store.