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

A town honors its legacy of traditional American Indian pipe carving with one gigantic pipe.

One of two giant blue cockerel statues erected with an intentional double meaning.

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

A palatial art deco restroom.

A warehouse for all of your architectural details.

A Borgesian work of art that may blur the line between fiction and reality a little too convincingly.

A museum within a museum, devoted to history's most questionable medical devices.

This posh mansion began as a family's estate and ended as the site of a murder ripped from the pages of a pulp novel.

Half of a waterfall goes into the river while the other half seems to disappear.

Duluth mineral magnates built this charming art deco lodge to be their private clubhouse.

This picturesque cliffside beacon no longer calls to sailors but shines once a year in honor of a famous shipwreck.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

A large circus museum with summer performances.

Marvel at this turn-of-the-century masterpiece that has been turned into a rather stately supermarket.

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

The only depiction of Abraham Lincoln holding a weapon, and the names of all 9,000 Cuyahoga veterans of the Civil War.

Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

An amazing collection of sculptures and art.

These curious caverns have been home to mushrooms, gangsters, and disco.

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

Home to the Amorphophallus titanum "Corpse Flower," which is among the largest flowers in the world and also smells powerfully of rotting flesh when in bloom.

This iconic water tower and failed bandstand is open for panoramic views once a year.