This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

An exquisite collection of fairytale conveyances that puts most car museums to shame.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

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 of the world’s largest cave systems houses legends, concerts, and wondrous rock formations alike.

Dating back to the second century, vestiges of prehispanic mural paintings are found in this underground palace.

Cool down and fill up after visiting Teotihuacán at this bar and restaurant in a deep, underground cave.

Elevated freight railway turned wildly successful urban park.

The first place where the scientific innovation known as radar was first demonstrated in Britain.

A monument with a strange legend involving a horse's tongue.

An incredibly well-preserved piece of ninth-century Viking poop.

Follow the original medieval paths that wind through this intriguing section of the city.

This memorial to World War II's fallen airmen shows us the movements of the stars that once guided them.

Semaphore saints, a golden dragon's head, and a stone carved with religious warnings all call this cathedral home.

A labyrinthine underworld of tunnels and caverns hides beneath the city.

A seaside town with no sea in sight.

The western face was supposedly left clock-less to snub the Welsh.

Mysteriously stacked storefront paths give this medieval British town an iconic style like none other.

This charming railway is one of the oldest and steepest funiculars in England.

This whimsical, unique clock has been entertaining shoppers for well over 20 years.

This bridge is the first to be made entirely from iron, but designed like it was still made of wood.

Created hundreds of years ago, the magical follies and landscapes at this park were almost lost to time before being restored.