Modern commuters still pass through this 2,000-year-old Roman archway.

At just 25 inches at its narrowest point, it's one of the tightest streets in the world.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

The weathered grave of a medieval anchoress who walled herself up in a cell attached to a church.

Used as an example in one of the first dictionary entries for "museum" in 1706.

A remarkable medieval structure born from a 14th-century disaster.

With lush plants and flowers, huge trees, ponds, and hidden monuments, this place feels a bit like discovering Narnia.

Ancient Egyptian wigs, South American feather headdresses, a bounty of anthropological artifacts in Oxford.

Once a train station along the Great Eastern Railway this vibrant coffee shop and bar is where members of London’s creative class mingle.

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

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

The largest greenhouse in the world is home to over one million types of plants.

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

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

Famously misunderstood wonder of the ancient world

Gargantuan home of Russian science.

Stalinist skyscraper built with help of cryotechnology.

The tallest hotel in Europe.

World's largest bell sits on the grounds of the Kremlin in Moscow.

A 250-year-old timepiece-automaton adorned with golden mechanical birds, which still sing to this day.

The oldest museum in Russia is home to a fascinating collection of nearly two million anthropological artifacts and anatomical curiosities.

Museum celebrating the achievements of the Soviet space program.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.