Every winter, the wind carves blocks of frozen water into beautiful abstract shapes inside this unusually curved tunnel.

The world’s largest collection of angel figurines includes 600 black angels donated by Oprah Winfrey.

A tribute to the twin ideals of religion and patriotism, built by a Catholic priest from rocks, glass, and innumerable found items.

A bizarre house filled with an astounding array of collections.

"Looks so real, it's scary!"

A large collection of motorbikes with some impressive gems.

The remains of a Rockefeller's lush Italianate estate hidden in the underbrush on the coast of Lake Michigan.

A Museum of Holography frozen in 1974.

Designed by Alfred Caldwel, this landscape showcases his vision of a native garden.

A source of civic pride, though the reason for its construction is unknown.

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

The sign to a demolished amusement park now stands in front of a local library.

A tribute to one granddaughter's old apartment which now represents the whims of each visitor.

A former atom smasher turned into an art gallery.

The murals have transformed a residential alley into a vibrant drive-through gallery.

A towering Art Deco movie palace made to look like a Mayan temple.

One of the first historical sites of an alternative universe was installed in the town of Paris, Illinois—which is now home to an annual spelling bee of Kcymaerxthaereal words.

A relic of the Cold War in Chicago.

This stunning gothic ruin was a casualty of the Indiana steel industry crash.

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

This cemetery is all that remains of a school for "wayward" girls.

The city of Rockford, Illinois is symbolically protected by a quartet of fittingly stony sentinels.

This lush 12-acre site was once named the finest Japanese garden in North America.

This deceivingly ordinary warehouse hides an enormous collection of pop culture treasures.