A quiet memorial marks the spot where the victims of the Salem Witch Trials were executed.

A museum dedicated exclusively to the lore and history of ouija boards.

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.

A commemoration of over 150 of St. Louis's favorite sons and daughters.

A late sculptor's last project was to turn this abandoned cement factory into a castle-themed amusement park.

Man-made geyser that rises to the exact height of the Gateway Arch.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

Fresh wooden posts have been added to ancient holes to recreate a primitive henge clock.

Quirky water tower advertises the long-gone Brooks Tomato Products Co.

Less a museum than a bizarre fantasy world created by artists and engineers.

In Edwin Hubble's hometown, a scale model of the groundbreaking telescope that was named in his honor.

World's largest magnetic research facility.

This fairytale-inspired cottage was created by a university literature professor.

This divisive system of turtle tunnels was built to save animals stranded after a highway split a lake in half.

No one really knows how these old hobby horses got here, but the herd keeps growing.

The world's only international cryptozoology museum is host to an unrivaled collection of mysterious objects.

A cave dug by a man directed by ghosts to find pirate treasure.

At the supposed instruction of Ben Franklin and Socrates, a Spiritualist believer intended to birth a mechanical messiah here.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

A collection of full-size movie monsters opened to the public.

The Man In Black grew up in a large agrarian community established by the federal government in the Great Depression.

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

This statue is an ode to an iconic roadside advertisement popularized during the 1970s.

The show pony of cave systems, Fantastic Caverns manages to live up to its name.