A fascinating insight into daily life in the Eastern Bloc.

Visitors can explore the role of mysticism throughout the ages inside this interactive museum of magic.

Macabre astrological automaton clock dating to the late 1400s.

A Jenga-style cylindrical tower of books that appears to go on forever.

Countless grotesque faces stare out from this eerie Prague art wall.

The remains of a failed canal can be found in several towns near Lake St. Clair and is known historically as "Mason's Folly."

An encyclopedic collection of mammal penises.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

A winding, blood-red tunnel of hardened lava navigable by foot.

A startling, centuries-old subterranean marvel hides in plain sight.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

Dilapidated Mayan-themed ballroom was one of Detroit's most popular venues through the 40s.

The concrete shell of an industry giant remains as a playground for graffiti artists, auto scrappers, and paintball warriors.

This railway-turned-greenway provides a pedestrian link in downtown Detroit and celebrates urban artwork.

One man's attempt to create an artistic wonder on a run-down block in Detroit.

The Beaux-Arts aquarium boasts a vast collection of saltwater and freshwater fish on an island in the Detroit River.

This sprawling bookstore spans four floors and has more than a million books in stock.

An angular maze of concrete in Grand Rapids acts both as public art and as a staircase for fish traveling upstream.

Where most of the world's flypaper was made.