Cavernous opening completely encased in Karst limestone.

The first statue to be added to Saint Peter's Square in over 350 years is an ode to migrants and refugees around the world.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

Breathtaking and huge 430 year old maps of Italy.

These pastel-colored homes were built when the island of Macau was a Portuguese colony.

These post boxes from a bygone era have been the source of controversy and debate.

Regal guardians to one of the biggest banks in the world, symbols of Hong Kong's history and resilience.

Since 1942, this third-generation Cantonese barbecue join has been turning out gorgeously lacquered roasted meats.

This curious fresh and salt water lake holds a secret that draws in deep divers from around the world.

A rare underwater observatory in the Caribbean that provides breathtaking views of vibrantly colored aquatic life.

Swim or sail to this pie-slinging boat off the coast of St. Thomas.

Rumored to be the famed pirate's lookout tower, this historic stone structure is now just watching for tourists.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

One Portuguese poet described this cape, the westernmost point in mainland Europe, as "where the land ends and the sea begins."

The verdant mossy ruins of a Franciscan monastery lie in the remote Sintra hills awaiting exploration.

Eat the ultimate iteration of Portugal's most beloved pastry.

The best place in the world to buy tinned fish.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

The pile of books behind the dignified writer gave the statue a most undignified nickname.

According to tradition this is the oldest church in Venice, but its actual age is a mystery.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Venice's island of the dead.