The Spanish city of Almería suffered up to 52 bombings from air and sea, with a total of 754 bombs dropped during the Spanish Civil War. This led to the decision to create a system of underground shelters for the protection of approximately 40,000 civilians. These shelters measure more than 4.5 km long, and they are equipped with a surgery room and a food storage room. They were designed by the local architect Guillermo Langle Rubio, being today the most important and better preserved shelters in all Europe. These refuges have stood the most important attack in all Almería's history, the Bombardment of Almería, by the nazis in 1937.
References:The Broch of Clickimin is a large and well preserved, though somewhat restored broch near Lerwick. Originally built on an island in Clickimin Loch (now increased in size by silting and drainage), it was approached by a stone causeway. The water-level in the loch was reduced in 1874, leaving the broch high and dry. The broch is situated within a walled enclosure and, unusually for brochs, features a large 'blockhouse' between the opening in the enclosure and the broch itself. Another unusual feature is a stone slab featuring sculptured footprints, located in the causeway which approached the site. Situated across the loch is the Clickimin Leisure Centre.