Dragonsreach Dungeon

Description
Dragonsreach Dungeon serves as home to a proportion of the Whiterun's guard and the prison.

The entrance area has the chests you need to retrieve your items, either after you serve your time or if you reach in from the sewer grate behind the chests.

The main cell block has cells on either side (Adept, unless a quest-related cell) and a door at the opposite end leading to Dragonsreach. The cell to the west is of particular interest, as it comes decked out with food and a variety of luxuries not normally associated with jails. This is where the more prominent miscreants are kept, usually after a drunken binge.

A man named Arn is imprisoned in this location, but only after you undertake Thieves Guild Quest; Imitation Amnesty.

Bugs
Theres a bug where if you use a dragon shout a few times. A guard will unlock your door and ask you to stop. You can then escape prison this way.