This massive railroad spike celebrates the 1939 premiere of the movie “Union Pacific.”

The world's only three-story rotary jail is now a museum to a bizarre trend in prison design.

Beating out all other concrete competitors, this massive garden feature's pointy hat has earned it a world record.

A hidden barn-sized rendition of Grant Wood's most famous, and most parodied, painting.

This water tower has been a staple of the Rochester skyline since 1931.

Built in 1931, this small passageway is believed to be the first modern skyway.

Where the notorious gang lived while on the run from the FBI.

This double-arched masonry highway bridge is the only structure of its kind in Minnesota.

Triangular House built on a leafy residential street in St. Paul.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

The only arched bridge made of stone on the entire Mississippi River.

This old residential building was once the largest flour mill in the world.

When flour explodes, it's not a pretty sight.

Downtown Minneapolis mixed art and function by turning some of their sewer covers into works of art.

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

After the musical legend's death, his memorial was mysteriously graffitied in gold.

A bronze statue on a downtown corner honors Minneapolis's favorite career gal.

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

This 1960s kinetic artwork has been restored and is once again whirling away in downtown Minneapolis.

Thousands of people walk over this fantastic work of art every day, but how many notice it?

Three legendary, living albino buffalo roaming their pastures for all to see.

Dedicated to the inventor of the paint roller.

This museum is a full-size replica of an original church constructed during the 13th-century.