As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

2300-year-old Roman road connecting the empire.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

An alchemist's "magic door" stands in the middle of a Roman park.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

Although now a decaying ruin, this stone cabin's history includes several notable figures.

This 24-acre park offers a place for meditation in the midst of Sedona's iconic red rocks.

A spiritual vortex among the red rocks in Sedona.

This amazingly well-preserved villa just outside Pompeii boasts rare examples of ancient Roman paintings.

Ancient snack bar of the Roman Empire re-opened.

Skulls from the plague of 1656 and World War II bombings are united by a cult dedicated to caring for the ancient dead.

A small self-proclaimed micro-state located on a piece of disputed territory between Croatia and Serbia, near Liberland.

A park in a small Pennsylvania town is home to an original sculpture by one of its native sons, legendary artist and activist Keith Haring.

Inside this small chapel tucked away in the forest is one of the most well-preserved Danse Macabre frescos.

This military tunnel dates back to World War II and provides visitors with a little wartime adrenaline.

A full figure 4th century incorruptible saint lies in a glass coffin in Croatia.

Croatia's "hairy stone" fortress is one of the most well preserved Istrian castles.

A wunderkammer of gold and silver reliquaries and ancient saintly bones.

Croatia's towering concrete blossom grows from the site of a World War II concentration camp.

This picturesque medieval monastery guards a small trove of historic treasures.

This Croatian fairytale castle is slowly falling apart thanks to years of neglect.

Humble beginnings for one of the world's most famous scientists.