The world's oldest bookshop still in operation.

Houses are tucked between, on, and underneath giant boulders.

A complimentary beverage is offered to the bodega's resident rodents every day.

Perhaps the most spectacular grotto along the Algarve coastline.

After it was swallowed by a Georgian mansion, this medieval castle remained forgotten for centuries.

The chaotic studio of one of the 20th century's most important artists has been preserved down to the dust.

A restaurant with an extensive Irish whiskey bar also has several first editions of famous works by Irish authors.

Some of the saint's blood and bones are said to reside in Dublin.

Oliver Cromwell once seized the land under this house, which included the ruins of a medieval abbey that the owner used to build his stately home.

The remains of this deep, dark mine have left behind a haunting rocky warren of tunnels.

An 80-year-old plane tree is devouring an iron bench at Ireland's oldest law school.