Dynastic Home of the De Piro Family.

This subterranean necropolis holds three floors of antler-dug grave caves.

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

The Jesus tree of Malta bears a striking resemblance to Christ on the cross.

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

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

This multicolored meandering masterpiece is Britain's longest bench.

An abandoned World War II tank left to rust in the downland.

It was once the longest continuously running cinema in the United Kingdom.

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

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

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

The remains of a 1st-century aristocratic Roman town house featuring beautiful well-preserved mosaics.

Overshadowed by other, more famous Maltese catacombs, this ancient burial chamber has one of the best examples of a ritual agape table.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

Ancient mysterious ruts carved in the bedrock.

This Stone Age solar temple aligns with the sun on each equinox and solstice.

This macabre monument atop an ancient well gives a nod to a brutal episode in Scottish clan history.

Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.

The fishing boats that moor in this small lagoon enter and leave through a tunnel to the sea.

This prison on the Maltese island of Gozo is almost 500 years old, and they have the graffiti to prove it.

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

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

A motley, fantastical agglomeration of unlikely houseboats along the Shoreham-by-Sea riverbank.