This medieval manor house was hastily fortified when it found itself in the middle of the Scottish fight for independence.

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

Artists have long been drawn to these atmospheric 12th-century ruins.

This Norman castle was once the site of a Victorian-era prison, and now exists as a luxury hotel.

This wooden chair dates possibly back to the 15th century, and commemorates a local legend.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

Only a few pieces remain of the structure that carried people and goods across the Thames for some 600 years.

In 1329, Christine Carpenter entered this small stone cell in the hopes of becoming a living saint.

Remarkable medieval wall paintings decorate this 12th-century, dog-friendly church.

An ancient yew tree and holy well nestle beside a remarkable 13th-century church.

This 15th-century church was once described as the ugliest in England.

Two minuscule windows are tucked inside this medieval building.

One of London’s rare Tudor-era buildings is a fate-defying gatehouse for a church.

This tiny church is one of England's smallest.

Wander among the abandoned ruins of this once-powerful medieval town.

A map made up of 32 different materials, representing Ireland's 32 counties.

On the clock tower at St. Anne's Church in Cork, you never know which face is telling the truth.

The smallest chapel in Europe is a moving testament to the love between a husband and wife.

Once an early Christian burial site, it's believed the location was home to around 200 gravestones.

One of Ireland's best-preserved chambered cairns can be found next to a wishing tree.

The eerie remains of one of Ireland's oldest castles, said to be haunted by the ghost of a woman who brings ill fate.

One of the oldest lighthouses in the world, this structure was built more than 800 years ago.

This 19th-century prison once held Irish revolutionary Constance Markievicz, writer Frank O’Connor, and a nine-year-old pickpocket.

An elaborate Romanesque archway, built right before the British occupation of Ireland.