Holyrood Abbey, Scotland. Ris an old word for a type of Christian cross, bearing a lower cross-bar as well as the main upper cross-bar. It therefore means the cross which Jesus Christ was crucified upon; thus the name Holyrood is equivalent to "Holy Cross."
St Mary's Close, Edinburgh, Scotland is a maze of underground 17th streets, once home to hundreds of people, conditions were horrendous and once bubonic plague took hold and most of the people died it was sealed up and forgotten about until the 18th century when workman woking above punched through to the streets. It is now opened to the public and you can have a guided tour of this creepy place