The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

An abused and forgotten metropolis, abandoned for centuries.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Protecting the dead from opportunistic body snatchers.

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

A statue in the heart of Edinburgh honors a bear that served in the Polish military during World War II.

A little slice of Japan and its aesthetics in London's Holland Park.

The final resting place of soldiers' loyal canine companions.

A sweet symbol marks the place where torturous executions were once carried out.

The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

A scattered trail of street art adds a pop of color to the city's stark structures.

This luxury shopping lane has been protected by its own tiny police force for over a century.

A red sandstone freestanding monolith rises out of the sea in northern Scotland.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

The Columbia Road Flower Market is now open every Sunday, rain or shine.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

A book bound in the skin of an infamous criminal, along with countless other specimens.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

Giant, friendly pelicans in Central London, the most unlikely of places.