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

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

Hundreds of graffiti artists have decorated this flood-wall on the west bank of the Mississippi River.

More than 12,000 years ago, this park was a playground for mastodons.

The eccentric and colorful pavilions of Tower Grove park are a beloved and overlooked symbol. 

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

This former Union fort commands a fine view of downtown Cape Girardeau and the Mississippi River.

Some of the oldest exposed rock formations in the United States.

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

A plaque on the side of a parking garage marks the burial place of a great Ottawa chief.

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

One of the world's earliest skyscrapers.

Around 50 million gallons of water flow from this spring every day.

This mausoleum is the final resting place of one of St. Louis's richest and most tragic families.

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

Giant works of art interspersed throughout meadows and woodlands offer a new discovery at every turn.

One of the deepest springs in Missouri.

The only pig museum in the U.S. holds one of the world's largest collections of pig items.

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

One of few surviving standpipe water towers in the U.S.

During the 19th-century, this park was a vital trading fort.

An abandoned factory along the Mississippi coated by a giant mural.

A sculpture of a giant man escaping from the depths of the Earth.

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