The animals wander freely amid this gorgeous stretch of nature.

This museum in a shuttered train station remembers the island's forgotten rail system.

A 1970s resort city now stands abandoned, caught in the middle of a divided island.

A Romanian church built from one single oak.

Now harmless, this looming post struck fear into the heart of medieval troublemakers.

Rolling sand dunes of the Sahara... in the middle of the Atlantic Ocean.

Formerly Yugoslavia's "forbidden island," this sleepy little city still holds the abandoned remains of military strongholds.

A musical instrument played by the sea.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

Once part of an ancient international harbor, it's now an all-you-can-eat shrimp buffet for flamingos and other water birds.

Even drowned in an ocean of toxic waste, the remnants of this Romanian village stand tall.

A naturally beautiful, seemingly bottomless deep blue spring.

The colorful soil of Iran’s "Rainbow Island" attracts artists and nature lovers.

This 17th-century structure is a beautiful testimony to traditional Persian architecture

In this tiny Iranian town playing on the roof isn't just encouraged, it's the only place to go.

The palace of the King of Kings, burned by Alexander the Great.

This hauntingly beautiful cemetery outside a medieval citadel is full of winding paths and ivy-covered graves.

The only remaining arch of the oldest stone bridge in Rome stands in the middle of the Tiber.

This ancient market is often referred to as the oldest shopping mall in the world.

Once the legendary capital of the Dacian Kingdom, this city has been reduced to mere ruins.

One of the oldest churches in Romania is believed to have been built on the site of a pagan temple.

The romantic botanic tunnel feels like a well-kept secret.

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

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