Bergen Museum or officially The University Museum of Bergen was founded in 1825. It is divided into two departments, the Natural History Collections and the Cultural History Collections and Public Outreach and exhibitions. It is also the caretaker of the museum garden, formerly the botanical garden, surrounding the natural history building, and the city's arboretum. The cultural history museum exhibits the history of region from the Stone Age to Viking Age and modern history.References:
The city walls of Avila were built in the 11th century to protect the citizens from the Moors. They have been well maintained throughout the centuries and are now a major tourist attraction as well as a UNESCO World Heritage Site. Visitors can walk around about half of the length of the walls.
The layout of the city is an even quadrilateral with a perimeter of 2,516 m. Its walls, which consist in part of stones already used in earlier constructions, have an average thickness of 3 m. Access to the city is afforded by nine gates of different periods; twin 20 m high towers, linked by a semi-circular arch, flank the oldest ones, Puerta de San Vicente and Puerta del Alcázar.