A sign marks where the two bodies of water meet.

Smack-dab in Campania’s volcanic fields, this scenic lake was once thought to be the gate of hell.

A small but very fascinating fountain in the center of Rome with four books and a deer carved.

One of Scandinavia's largest mosaics pays tribute to Danish art and science luminaries.

One of the most important fortresses along the Danube now lies in ruins.

This stunningly massive housing complex is a go-to filming location for dystopian sci-fi cinema.

This restored house offers a twist on Penang's Peranakan history.

The lost library of Alexandria, revived as a spearhead of cultural preservation.

Right beyond the Uzbekistan-Tajikistan border lies the oldest human settlement in Central Asia.

According to legend, this is the burial place of a mythical three-legged death omen horse.

Florence’s archaeological museum displays an ordinary stool that once shattered one of its most prized artifacts.

This Theravada Buddhist temple is a peaceful oasis steeped in history.

One of Malta’s most popular beaches features a seemingly out-of-place statue of the Virgin Mary and baby Jesus.

A stunning example of traditional salt production set against a dramatic volcanic landscape.

This abandoned building, which is the second-largest structure on the Maltese island of Comino, has a complicated past.

The ruins of a fifth-century church dedicated to Our Lady of the Harbor.

One of the best examples of a Byzantine period monument in Albania.

The original version of Porto's most famous sandwich is just as good here as it was a century ago.

A suburban housing complex with astonishing architectural features, locally nicknamed "the Camemberts."

This fortress was built using the last surviving stones from the Lighthouse of Alexandria, one of the Seven Wonders of the Ancient World.

One of the world's best-preserved Roman amphitheaters is also one of the most unusual; it's made of black volcanic rock.

Hidden masterpieces in a small church in the medieval city of Bergamo.

London’s first road overpass is so old that it was originally built for horse-drawn carriages.

This fortified town dating back to the 1400s is often described as an open-air museum and is a protected National Monument of Bosnia and Herzegovina.