Our Lady of the Rocks is one of the two islets off the coast of Perast in the Bay of Kotor, Montenegro. It is an artificial island created by bulwark of rocks and by sinking old and seized ships loaded with rocks. The Catholic Church of Our Lady of the Rocks is the largest building on the islet, and has a museum attached to it. There is also a small gift shop close to the church and a navigation light at the northern end of the islet.
According to legend, the islet was made over the centuries by local seamen who kept an ancient oath after finding the icon of Madonna and Child on the rock in the sea on 22 July 1452. Upon returning from each successful voyage, they laid a rock in the Bay. Over time, the islet gradually emerged from the sea.
Wikipedia https://en.wikipedia.org/wiki/Our_Lady_of_the_Rocks
Address Montenegro
Coordinates 42°29'12.118" N 18°41'19.468" E