17,400 lbs., 12 feet in diameter, and 29 years in the making.

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

This secret gem of a toy store houses a rideable carousel populated with fantasy animals.

The remains of a World War II munitions factory still haunt the fields of this Twin Cities suburb.

Admire the art and then buy a raccoon skull cleaned by flesh-eating beetles.

This bright yellow building is packed with sweet treats from all around the world, from chocolate-covered crickets to whoopie pies.

Enter the Forest of the Elves.

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

Find out what it sounds like when doves cry at Prince's recording studio estate turned museum.

When waves crash onto this section of beach, the rocks sing a song.

An architecturally-focused antique shop.

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

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

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.