A lovely hidden waterfall right off the highway is well worth a stop.

A fairytale art house in the middle of Wisconsin.

The arboretum whose marshy soil sucked up the dreams of housing developers.

This cave holds a surprisingly colorful variety of geological oddities.

This pebble beach is so beautiful that taking its rocks is against the law.

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

Summer in the "Turtle Racing Capital of the World" means rousing weekly reptile races.

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

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

An unusual assortment of art, furniture, and other curiosities.

20,000 pieces in a Frank Gehry-designed building.

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

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

This lab's maddening silence is good for business but bad for sanity.

The remains of a bustling turn-of-the-century park built to showcase the wonders of electricity.

A four story, football field-sized, nine-grotto creation made of shells, minerals, and rare stones.

A warning to the weak-kneed: This narrow bridge does its swinging eight stories high.

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

What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

This majestic tree has survived 400 years of storms, droughts, and floods, and is a beloved natural landmark in Missouri.

An unexpected but incredible collection of wildlife dioramas spanning rainforests, swamps, forests, and plains.

A geological oddity formed by two rivers carving out a mass of limestone on both sides.

400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

Curious cave that stays a cool 56 degrees all year long.