A defensive structure built during the Hundred Years War has remained useful in one way or another for nearly 700 years.

Museum about life, death, and cannibalism in the Stone Age.

If you forgot something to read during your trip to Tokyo, this hostel has you covered.

Luxury hotel turned into a refugee camp, then turned back into a luxury hotel.

A majestic hotel for dreamers rises from the center of a fairytale wood.

An isolated village literally built into the crevices and rock formations of a mountain.

This 14th-century monastery survived Turkish raids, Nazi occupation, and even a stint as a spot to store towels.

Ancient ruins hidden underneath a modern luxury hotel.

The ruins of a megalithic monument sit right in the garden of a luxurious Maltese resort.

Visitors flock to the historic birthplace of radiobalneology for its therapeutic radium treatments.

A fortress built to pacify local uprising that had a stint as a Nazi concentration camp before becoming a five-star hotel.

This fantastical icy castle is built anew every winter.

This foolish Victorian sea fort was converted to a deluxe hotel.

Hundreds of thousands of concrete bunkers crowd Albania long after the fall of Communism.

Open-air museum with a large collection of Soviet-era statues.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

Time capsule of a museum, in which the Soviet Union remains alive and kicking.

Sofia's legislative center is continuously reinventing itself.

Remnants of the city's Soviet history hover over this modern fast-food outlet.

This virtually windowless mass of smooth concrete is the only Catholic church in the city.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

Alexander Hamilton’s creation caused quite a bit of controversy.

The medieval center of the Islamic world was also once the seat of Saladin's sultanate.

What may be Boston's finest Art Deco building, located in the city's Financial District.