A ruined castle stands atop a hill surrounded by dragon lore.

Built by the Portuguese colonists in the early 16th century, this fort is one of the oldest European structure in Asia.

One of the tallest bell towers in Italy plays a particular melody at just two times each day.

This 2,000-year-old Doric bridge is still open to pedestrian traffic to this day.

A famed artist's inspiring work of peace and tolerance.

Discovered on a shipwreck after more than 400 years, this Renaissance ratter tells a very waggly tale.

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

This building has two facades of clashing architectural designs.

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

Nine centuries-old fortresses guard the walls of this medieval Romanian city.

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

The reconstruction of this prominent building fulfilled a long-written command.

A graveyard that dates back over 200 years stands near a busy shopping center.

This nearly 200-year-old restaurant's history includes an exiled French prince, JFK, and a very hungry Daniel Webster.

These paved rills bring freshwater into Altstadt and could spell wedding bells for whoever stumbles into the waters.

This remarkable parking garage in Darmstadt has lived several lives and still contains remnants of its World War I past.

This 14th-century temple is also known as the "Temple of the Golden Pavilion" for its gorgeous gilded reliquary hall.

The last remaining predreadnought battleship in the world has been a museum for nearly a century.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

The remnants of a Gilded Age elegance preserved in the middle of a stark modern tower.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

The site of Paul Revere's historic two lantern warning.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.