This former nursery supplied plants for the creation of Chicago's largest park.

An enormous park-like oasis, full of famous Chicagoans' graves.

A monument to the art of slicing people open.

A giant bronze coil of feces is both a tribute to doggie defecation and a reminder to pick it up.

Located inside a former bread factory, this museum explores a century of transportation history through innovations that were extraordinary or failures—sometimes both.

This improbable contraption was passed down through five generations of industrious Tennesseans.

Abandoned for 60 years, this submerged bridge was completely forgotten until the lake was drained.

Once decrepit and slated for demolition, now one of the longest pedestrian bridges in the world.

This mansion turned restaurant was once a pitstop for Al Capone during his travels.

An oversized metal construction of Billy Tripp's moods going through life.

This boulder stays on its mountain thanks to a huge chain and on the map due to local legend.

Origin of the blue-skinned Fugates of eastern Kentucky.

This grave marks the final resting place of a legendary frontiersman... unless it doesn't.

This Tennessee museum is dedicated to a tragic railroad hero who inspired the famous ballad that bears his name.

Crumbling Kennedys and a decaying Tecumseh are just some of the haunting remains of one man's cement art trail.

The first full-scale tunnel built in America is short but scenic.

This award-winning men's bathroom was just too beautiful to not allow women to see.

Live long and prosper in Tennessee.

Mutant vegetables, transgenic mosquitos, and atomic rodents span the walls of this one-of-a-kind museum.

An ancient cave system in Tennessee’s Appalachian foothills converted to a 1,200-person music venue.

Alongside this Memphis trail are several sculptures that show trail-goers how to relax.

The world's largest collection of porcelain "veilleuses-theiere," or night light teapots, includes four that belonged to Napoleon.

This limestone outcropping was once a ceremonial site for ancient Native Americans.

Hiding behind a grocery store is a spectacular cavern carved as part of an old limestone quarry.