Edinburgh Castle had lots to see including a war museum. And lots of other people looking at the same sights.
It’s easy to see why the castle was built where it was. Panoramic views from inside.

These views are from inside the castle. That cannon has a name: Mons Meg.
The inside of the castle building was also interesting.
There are museum displays representing different Scottish regiments inside the castle.
Yes, that's a stuffed dog. From the 1850s.
They had the old prison set up with hammocks simulating what it would have been like in the 1700s. Revolutionary prisoners-of-war were kept here.
Stained glass and elaborate shutters.
Inside St Margaret's chapel. St Margaret's chapel in the castle is the oldest surviving building in Edinburgh, dating back to about 1130.
Round arches are Norman. Pointed arches are gothic. Amazing what you learn on vacation!