OpenStreetMap from the <a href="https://no.wikipedia.org/wiki/Operahuset_i_Oslo" class="extiw" title="no:Operahuset i Oslo">no:Operahuset i Oslo</a> Wikipedia page, showing <a href="https://no.wikipedia.org/wiki/Kontraskj%C3%A6ret" class="extiw" title="no:Kontraskjæret">no:Kontraskjæret</a> as a pop-up link. Screenshot of the Wikipedia page.
screenshot by <a href="//commons.wikimedia.org/wiki/User:Haros" title="User:Haros">user:Haros</a>
CC BY-SA 3.0
Map by OpenStreetMap, Wikipedia