Though its celestial ceiling is impressive, the true star is the vast collection of French books.

Small caves once used as a hiding place for some of those accused during the Salem Witch Trials.

A wondrously macabre treasury of obscure antiques and unusual oddities.

A small Chicago museum filled with thousands of preserved butterflies, beetles, and more.

This memorial plaque remembers a strangely shallow maritime disaster known as "Chicago's Titanic."

No one knows how many bodies are in this vault in a Chicago public park.

A notorious Route 66 eatery once frequented by Al Capone.

In the Shawnee National Forest, amazing rock formations peer through the treeline.

One-of-a-kind preserved ruins of an abandoned 1880s church in Chicago's Pilsen neighborhood.

This alley in downtown Chicago held the bodies of over 600 people after the fateful Iroquois Theatre fire.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

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

An antiquated German apothecary on Chicago's North Side.

Built in France in the 1400s, this gothic chapel now resides at Marquette University in Milwaukee, Wisconsin.

This storied music venue was once a tavern that housed an Italian Anarchist book club and prohibition parties; today it's a community space for artists and musicians.

Hidden in magnificent rolling countryside, see what may be the largest modern stone circle in the world at Wisconsin's very own "Stonehenge”

The secluded resting place of a local historical figure who perished during the sinking of the Titanic.

Eternal resting place of the grave robber and murderer who served as inspiration for many of cinema’s famous madmen.

A metal ring in the middle of the road marks the exact spot where the Soviet satellite crash-landed in 1962.

Century-old shop, specializing in Occult products.

A Gothic gym and community space that encourages fitness for misfits.

Grand architectural relics gain a new life in this Pennsylvania warehouse.

Construction uncovered this trove of fossils, which visitors are welcome to add to their own collections.

The Pennsylvania shopping center was once the setting for the 1978 film, "Dawn of the Dead."