I love to think about the structure of the city or town based on the geography. It is always something to do with how to protect the city from enemy and how to deal with natural disaster. Edinburgh has several monadnocks, the result of the volcanic activity around 350 million years ago, which is eroded by the glacier during ice age around 11,000 years ago. The castle is of course on the top of one of the monadnocks.
Fulmars were nesting on the cliff.