The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

This mosaic-covered bar is brimming with curated curios.

A museum dedicated to linguistics, from how babies learn to talk to endangered and extinct languages.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.

An off-the-beaten-path boutique stuffed with an eclectic collection of upcycled goods.

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

This weekly bazaar started in the 1960s as a way for hippie travelers to barter their goods.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

America's only city hall with minarets took architectural cues from Ali Baba and the Forty Thieves.

Located within a historic park, the beacon is the oldest standing structure in Miami.

Former villa and estate of James Deering developed to preserve native tropical forests.

A perfect circle of twenty-four mysterious holes dates back to prehistoric time.

Over 120,000 curious objects that have shaped our modern world.

This beautiful Miami garden was designed as a laboratory for tropical plants.

St Bernard de Clairvaux Episcopal Church, better known as one of the oldest European buildings in the Western Hemisphere.

An underwater city for the dead.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

The remains of a World War II munitions factory still haunt the fields of this Twin Cities suburb.

A treehouse assailed by the elements and the government, now gone.

This old residential building was once the largest flour mill in the world.

A hidden oasis in the heart of Minneapolis is also an Important Bird Area.

This iconic water tower and failed bandstand is open for panoramic views once a year.

Enter the Forest of the Elves.