This large midwestern cavern features impressive rock formations and an underground waterfall.

A spooky defunct railroad tunnel now part of a sprawling trail.

Giant six-pack could provide one person a six-pack a day for 3,351 years.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

Dakota legend claims this locally iconic pinnacle was once part of a sacred burial site that was cleaved in two.

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

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

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

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

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.

The watery grave of an impractical idea.

This rare vessel mixed luxury with labor before being converted to a museum and sometimes haunted maze.

The famed architect designed this Minnesota gas station of the future with a lookout tower.

A fitting attraction for the corn capital of the world.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

An amazing collection of sculptures and art.

The first declared National Monument in the United States.

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

A toweringly silly piece of modern art has been delighting locals since the 1980s.

An abandoned fish-shaped drive-in gets a second life as a restaurant.

This quirky roadside attraction provides insight into Minnesota's logging history.

Home to a vast collection of The Wizard of Oz memorabilia and the site of an infamous theft.