The mysterious megaliths have enchanted and intrigued visitors for thousands of years.

A fantastic castle rumored to be the birthplace of King Arthur.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

This hidden green space is the city's second largest conservatory.

Northern Ireland's Brobdingnagian stepping stones.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

Famously misunderstood wonder of the ancient world

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

Catacombs turned marketplace.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

Every Sunday, Bogotá turns 75 miles of its city streets into a bicycle superhighway.

The world's first crowdfunded skyscraper has not gone quite to plan.

In the heart of Medellín, an artsy urban complex sets the stage for demonstrations and protests.

Located outside Medellín, this Colombian park focuses on conservation and sustainability.

This colonial town in Colombia sits around the largest stone paved square in South America.

Pilgrims each carried a brick to the top of Mount Monserrate to help build this historic sanctuary in Colombia.

A celebration of Colombia’s premier contemporary artist.

Two identical statues by Fernando Botero, one blown to pieces in a terrorist bombing, the other donated as a gift for peace.