This museum explores the history and development of dentistry and dental technology in Michigan.

See prehistoric footprints, plus two complete mastodon skeletons.

Everyone's invited to put on a miniature concert with this world-class musical wonder.

An ever-evolving wall of graffiti art off East Liberty Street.

For books about travel, whether factual or fictional, the perfect antiquarian does exist.

An old anti-aircraft cannon.

The last surviving submarine from a strange chapter of Finnish history.

This church also serves as a lighthouse complete with a beacon.

These enormous, stern-faced statues greet visitors with lanterns, and sometimes costumes.

This insurance company building reminds customers that witches, bears, and gnomes are out there, best be insured.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

Architecturally stunning library serves as the hub of Finnish scholarly life and culture.

The US Navy's only submarine museum is also home to the world's first nuclear submarine.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

One-time largest man-made structure in the world will be a park in 30 years.

These were the largest wind chimes in the world when artist Tom Van Sant created them for a California mall in 1967.

Oldest building in California still in use.

The legendary building that needed ghostly approval before being built.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

Unconventional site where the tracks of Zurich tramcars intersect.

Old batteries and frog skeletons reside in this lakeside monument to Alessandro Volta.

One of the oldest Christian churches still standing in the Americas, and almost certainly Mexico's oldest in continuous use.

The only castle in North America to ever house European sovereigns.