Wanda Mound is a tumulus assumed to be the resting place of the legendary princess Wanda. According to one version of the story, she committed suicide by drowning in the Vistula river to avoid unwanted marriage. The mound is located close to the spot on the river bank where her body was found. Archaeological studies, conducted on site in 1913 and in mid-1960, did not provide any conclusive evidence of the mound's age and purpose.
The mound base, some 50 metres in diameter and its height is 14 metres. Unlike the other three mounds in Kraków, this one is not located on a natural hill.
The first written record of the mound comes from the 13th century. Within a mile of the mound-site in 1225 a monastery was built by the bishop of Kraków, Iwo Odrowąż, called the Mogiła Abbey, which is still active today. In 1860 it became a part of Austro-Hungarian fortifications, pulled down only in 1968-1970. In 1890 a monument designed by Jan Matejko was erected at the top.
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.