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

Only through the lens of a microscope can visitors see the true treasures inside this museum.

The history of the treatment of mental illness, illustrated in all its gory detail, and housed in an asylum.

This recently restored timepiece has stood all around Kansas City.

This collection features more than 240 antiquarian maps from around the world, in addition to historical views and plates focusing on North Florida.

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

This titanic steel chain linking two buildings was installed without permission but instantly beloved.

This psychedelic tromp l'oeil seems to be beckoning drivers to crash into a wall.

A creepy sculpture of a decapitated head invites viewers to see St. Louis through its empty eyes.

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

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

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

This mosaic-covered bar is brimming with curated curios.

This is not your typical jungle gym.

An artistically engineered dam designed to honor the relationship between humankind and nature.

Step back in time at this 1950s display home, built to showcase once cutting-edge electric amenities.

Three historic trains run on a half-mile track that features a tunnel.

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

This small museum gives visitors a chance to soak up the history of the "sponge capital of the world."

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

The first custom-designed building to showcase the works of Dale Chihuly is a wonderland of glass and light.

World's largest Christmas store.

A sprawling maze of used books piled from floor to ceiling.

This ancient octopus-like tree was saved from destruction thanks to shady reporting.