In thinking about ways to build up the Acrobatics skill - it occurred to me that Fort Caractacus makes an excellent multi-level jungle gym
It is also useful for a number of other purposes though, as I thought on it.
1) It is right across the bay from the Imperial Prison
2) You can use the bedroll on the second floor to level up
3) One of the fun ways to raise conjuration is to hatch skeletons and cast turn undead on them - this annoys Ancotar no end!
4) It's a good place to conjure sparring partners to raise blunt, blade, and armor ratings
5) Jumping from the different levels raises acrobatics, running back up the stairs raises athletics, casting healing spells raises restoration (RAPIDLY!)
6) It is convenient to shopping, what with the Imperial City right across the water from it
7) you can use Ancotar to practice the Sneak skill
* I assume it is named after Professor Caractacus Potts from the old Disney flick "Chitty Chitty Bang Bang"...