Ships still use this historic lighthouse to navigate dangerous, island waters.

Alien rock formations grown from the sands of an Australian national park.

Everything about this over-size novelty animal is huge including its testicles.

A replica of an early 19th-century vessel that sailed across the world.

Hundreds of people walk past this palm tree every day without spotting its secret.

High Victorian fantasy created a fairytale castle out of a ruined fortress in Wales.

A 200-year-old prison that now houses a peculiar crime museum.

The Great Fire of London and the regulation of one-way streets both started in this alley.

The commemorative stone column conceals a secret laboratory.

Scattered throughout London are ancient remnants of the city's former bounding wall.

Famously misunderstood wonder of the ancient world

The first archaeological site discovered by aerial photography.

Sometimes an island, sometimes a rocky outcropping connected to the world by a tiny suspension bridge.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

This cannonball embedded in the side of an Edinburgh house once served a surprisingly pedestrian purpose.

A remarkable feat of Victorian engineering across the Firth of Forth.

The seaside ruins of an ancient salt production facility.

This tall stone wall with no door and ill-matched windows was built centuries ago, and used as a shelter for domesticated pigeons.

The largest hewn stone in history.

A patchwork of ruins from various civilizations in one of the world's oldest continually inhabited cities.

An intimate look into the apartments of Jounieh via cable car.

A monumental underground karstic wonderland is also the water source for over a million citizens of Beirut.

This modernist cinema has survived war and reconstruction to become a symbol of Lebanon’s revolutionary spirit.

After this one-of-a-kind palace was built the architect's hands are said to have been cut off to keep it that way.