This abandoned iron furnace was one of the first to use coke—a type of high-carbon fuel—to make iron.

Visitors to Salt Springs State Park are encouraged to literally put their two cents in Penny Rock.

Oldest existing wire suspension bridge in the United States.

A floating museum that was sunk by a flood and left to rot in the tides.

A cave 150 feet beneath Kansas City is the perfect climate for growing 10,000 delicate orchids.

A museum celebrating the Victorian obsession with hair art.

Outside the Missouri Quilt Museum, this large spool has more than one million yards of thread—and counting.

An average of 33 million gallons of water pour out of the collapsed cave at the heart of this spherical spring.

A historic, scenic mill that was forced to close due to overlogging.

Rusted and decayed, this former mining site is a portal to the past.

The deepest spring in Missouri.

These pink granite water slides are the result of millions of years of erosion.

Often referred to as the largest spring in America.

Away from the crowds of fishing enthusiasts, take a hike deep into the woods and journey into an eerie darkness.

After miraculously surviving a giant flood, the 19th-century nut tree and its offspring are protected with their own tiny park.

A beloved, quirky little fountain featuring a large frog spitting water at a naked boy.

When he found his hometown was no more, Lowell Davis decided to recreate a "new" ghost town from scratch.

A celebration of the animation wizard's childhood home and antique railroad memorabilia collection.

One man's unrequited love stands in a glass box forever.

A museum dedicated to man's boldest venture.

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

Another in a long tradition of legends regarding infernal seats.

This otherworldly church spire reaches up toward the heavens.

A small museum dedicated to the whimsical tool that turns sugar cookies into works of art.