A huge musical instrument played by the ocean.

Finale of "William Tell Overture" can be heard as drivers pass over grooves in the road.

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.

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

A giant desert bird that once swung music fans at Coachella now has a home in a nearby traffic circle.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

A set of 27 bamboo tubes creates an eerie soundscape that changes with the wind.

This kaleidoscopic mural shows Bob Dylan throughout his transition from young troubadour to Nobel laureate.

An architect transformed this abandoned cement factory into his castle-like workshop.

A disconnected rotary phone for "calling" lost loved ones offered a unique way of dealing with grief in disaster-stricken Japan.

Martin Bricelj Baraga's monolithic sculpture measures the blueness of the sky, and changes color to match it.

These expertly crafted, scientifically accurate glass sea creatures were once an international phenomenon.

This lake in northwest Iran has started turning from green to red more frequently than scientists are comfortable with.

The hollow trunk of this 650-year-old tree was used as a hideout by two Jewish brothers during World War II.

An institution dedicated to curiosity, logic, riddles, and Mongolia's long history of puzzles.

About 80% of all U.S. avocados are descendants of Rudolph Hass's glorious tree.

A perilous medieval road leading right into the sea.

The celebrity luchadores of La Paz are tough ladies in traditional petticoats and braids.

A Himalayan monastery claims to have a piece of a centuries-old abominable snowman.

This art center is way beyond your average pumpkin-carving operation.

The Arctic Circle runs through this isolated spot north of Iceland.

Trace the history of writing at this unusual North Carolina destination.