Catacombs turned marketplace.

A mysterious artist-run cabinet of curiosities and library.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

Wonderfully preserved Victorian factory, complete with a preserved steam powered engine house.

Thanks to both terrific preservation and historic vandalism this ancient site is known as the "Heart of Neolithic Orkney."

During this Shetland Islands celebration, hundreds of torch-carrying "guizers" lead a procession to burn a viking longboat.

Possibly the oldest living thing in Europe, more likely a pagan survivor.

A 19th-century time capsule of travel, fiction, and historic texts still available to the public.

Peruse rare tomes like poetry bound in pearls or books with branches and berries growing out of their spines.

A scenic ravine with an astounding collection of rock art created by the Indigenous people of the Great Plains.