The Argonaute submarine was the French navy's pride and joy in the 1950's.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

A subterranean shelter remains intact under a busy Paris railway station.

Paris' fabled purveyor of exotic taxidermy and natural history curios.

An isolated island home to one of the oldest English-speaking communities in the region and Maryland's state dessert.

This 13th century Gothic brick castle is the largest in the world by surface area.

Its look is severe, but its location, isolated on a hill in the middle of the countryside, is particularly scenic.

A rare example of an ancient Japanese hill castle believed to be the fortress of a legendary demon.

This castle once belonged to one of the most prominent families of medieval Carrickfergus.

A beautiful, historic location open to the public.

A schoolhouse and chapel are all that remains of this alpine village.

A historic town sits upon the site of a long-lost 18th-century trading community.

This historical village takes you back to the 19th century.

Experience this Iron Age village the way that its original residents would have.

Curious cave that stays a cool 56 degrees all year long.

The majority of the highest mountain in Poland is actually located in a different country.

A beautiful drive through the foot of the Alps traces the path of 15th-century Turkish raids.

Narrow passes cut out of mountains surround the medieval capital of Japan.

The highest point in Mississippi is a hilltop that was once used to bombard a nearby town with artillery.

Eat your Big Mac in a DC-3.

This Boeing KC-97 tanker is now a restaurant for aviation lovers.

One of the few places in the world home to living stromatolites.

A semi-abandoned village destroyed by U.S. bombings during World War II dominates the valley of Turano.