This modest relic, with rich history as a strategic fort through multiple eras.

The oldest city park in Walla Walla is home to hundreds of birds, from wood ducks to white peacocks.

One of the iconic moai of Rapa Nui stands guard in Lyall Bay as a symbol of the friendship between New Zealand and Chile.

This plot of old-growth forest is the largest surviving remnant of New York City's original woodland.

This sinister Baroque entryway could lead you to a terrible fate.

A Bauhaus co-founder designed this quirky, abandoned granary.

The world's first fully-fenced urban ecosanctuary is a haven for New Zealand's rare and endangered species.

You can still walk across this beautiful medieval bridge in Andorra.

A famed admiral left behind this 17th-century house key when he joined the British Navy.

This tiny Swedish troll protects the land and all who wander within it.

A hidden treasure in London with a rich medieval history, and the resting place of many luminaries.

This abandoned but well-preserved Prussian fortress sits abandoned in a Polish forest near the German border.

One of the three perfect vellum copies of this historic book known to exist is on display in a specially-designed case.

An extraordinary collection of vampire-themed antiques lurks on the second floor of a store.

In the sleepy town of Gozo exists a reproduction of the entire town of Bethlehem.

This 50-foot-deep sinkhole created in the 14th century is home to rare plants and fungi.

Ancient mysterious ruts carved in the bedrock.

These temples are among the oldest free-standing stone buildings in the world.

The medieval home is still engraved with the symbol of the profession, an eye flanked by two axes.

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

This almost-forgotten underground dungeon housed several convicts over the years, including Caravaggio.

This unique building in the main square stands out among the city's typically Baroque architecture.

Enigmatic tombs and cave dwellings on the outskirts of a rural village.

This spectacular dome managed to survive after being bombed in World War II, in an event known as the "Miracle of Mosta."