Edinburgh is an interesting place. Lots of old stone buildings, not so much green stuff. And of course....there's a castle!
Edinburgh castle is built on the core of an ancient volcano. It's enormous... The place got too crowded before I could see all of it, but it was a good experience.

The city's other landmark, Arthur's Seat, is another volcano core. It was a good hike up to the top. Quite a contrast to see such an untouched area after all the stone buildings.