A chilling disappearance (and rescue) of a child uncovers a geological mystery.

Built to house a chapter of the Knights Templar, this grandiose building is a relic of Freemasonry in Chicago a century ago.

A bizarre house filled with an astounding array of collections.

The remains of a enormous earthen figure of unknown origins cuts across a rural Wisconsin road.

This cave holds a surprisingly colorful variety of geological oddities.

Pizza with a side of fine art.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

Cemetery featuring rare glass-fronted columbarium.

An antiquated German apothecary on Chicago's North Side.

The palatial McDonald's that inspired Wesley Willis.

Once called the "Polish Gold Coast" it is an icon of the neighborhood that bears its same name.

Op-art architecture designed for happiness.

A museum of alchemy and a basement laboratory all housed in an ancient building in a Gothic tower.

A church of bones, decorated with 40,000 human skeletons.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Macabre astrological automaton clock dating to the late 1400s.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

Baroque celebration of the end of the Great Plague of Vienna.

A fitting attraction for the corn capital of the world.

A bizarre roadside attraction and the first instance of miniature golf in the world.

Live long and prosper in Tennessee.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

The world's longest known cave system.

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