At more than 5,000 years old, these structures are among the oldest free-standing stone buildings in the world.

This church is named for one of the most dramatic tales in the early Christian church.

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

Hidden beneath a restaurant, underground tunnels tell the story of Malta’s tragic role in World War II.

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

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

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.

These lesser-known Maltese catacombs date back over 1,700 years.

A hidden tunnel of bones in one of Malta's oldest churches.

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

The floor of this spectacular Baroque sanctuary is covered in memento mori.

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

A poignant memorial to the 106 coal miners killed in three major accidents in Derbyshire.

This restored 17th century "conduit house," often mistaken for a watchtower, actually supplied water to nearby Bolsover Castle.

A decommissioned tube carriage within a London museum hosts a regular pop-up supper club.

A submerged archeological park still holds the wonders of a Roman Sodom.

A star-shaped fortress town fort built in the geometric model of the Renaissance utopian city.

The last gas works in England and Wales details how people once extracted the resource from coal.

Bronze sculpture celebrating the relationship between Churchill and Roosevelt.

More than 140 granite sculptures decorate the lawn of this French sculptor.

A tiny, forgotten park of surrealist sculptures in Angouleme.

One man's fifteen-year diversion lead to a garden of intriguing sculptures.

Exquisite examples prehistoric bas-relief carvings.