Board Thread:General Discussion/@comment-66.85.227.68-20130716204920/@comment-10862555-20130717085630

From the UESP Wiki:
 * If you return to the Embassy compound after completing Diplomatic Immunity, you can enter the grounds and the barracks, but not the Embassy building.
 * If you return with a horse, you can use it to gain access to a tree to the left of the Embassy inside the first section of the compound. Hit the jump button repeatedly and you will climb up the tree and eventually clear the fence. The whole Embassy is then accessible, except for the reception room and the kitchen.
 * It is also possible to reenter the Embassy through Reeking Cave using platforming and the shout Whirlwind Sprint. Reeking Cave is west-northwest of the Embassy. There is no icon on the map for the cave entrance, but it is almost exactly halfway between the Thalmor Embassy icon and the Ironback Hideout icon, near the end of the road as shown on the map. Once in the cave, in order to get up the ledge you must walk to the top of the log, aim the crosshair slightly above the right side of the ledge you are trying to get on, and use Whirlwind Sprint.
 * It is possible to reenter the Embassy via the outer wall, using a kettle and Whirlwind Sprint. From standing outside the main gate, looking in, go to the left and around the corner. Where the wall again turns left, drop the kettle and then pick it up to eye level. Slowly walk to the wall. When the kettle appears to have a hole in the bottom, whirlwind sprint in. It does not appear to respawn, so those killed during Diplomatic Immunity remain dead, but prepare to deal with the remainder.
 * It is possible to reenter using the wooden plate trick and walking through the front door. The exterior does respawn guards but not the interior. Repeat the wooden plate trick inside to access locked rooms.