Seventy-five miles of limestone caves host more than a million bottles of wine beneath a sleepy Moldovan town.

Leaking natural gas never stops burning on this hill, making it an infinite inferno.

The development of this cliffside waterpark is representative of Mexico's history of co-op tourism developments.

One of Edinburgh's most popular works of street art is located well off the beaten path.

This house is one of the most colorful in the country, and is the last remaining example of a historic villa.

The much-beloved mascot of a local museum.

This plaque commemorates an amazing 19th-century sea rescue.

At the height of alum production at this factory, human urine was a valued commodity.

A turn-of-the-century prophecy comes true when a mischievous wooden Devil watches the neighboring church burn to the ground

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

This memorial commemorates a defining 16th-century battle between English and Scottish forces.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

This patch of land is home to Sweden's largest burial mound, allegedly belonging to a mythical king.

A magnificent waterfall is also home to the remains of a Roman hydraulic engineering system.

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

At one of Berlin’s oldest churches, visitors can place mosaic tiles to help restore a medieval mural.

The last remnants of a massive medieval wall that once encompassed the city of Berlin.

These ruins once flourished as the capital of the Lydian kingdom, often credited with the invention of metal coinage.

This seaside sanctuary was once one of the most important religious sites for women in ancient Greece.

The hilltop town of Segni was once home to an ancient Roman colony and garrison.

An ancient tree that was once the favorite of a young Swedish royal.

A massive bridge forms part of an aqueduct that was deemed an architectural wonder of its time.

This small museum located under the famous cube houses, is home to some 30,000 chess pieces.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.