This is the reverse side of the Black Baron's Castle from the Super 4 series. The room on the top floor has a trap door in the ceiling (not seen here) which opens up onto the roof. The ladder on the right can be positioned there to lead from the room to the roof. When not in use, the room is closed off with piece of brick wall seen behind the princess on right. This allows the backside to be completely enclosed when the towers are swung inward.
The towers have small shelves where small objects can be placed, & knobs to hang things from, such as the Colossus' shield. The two platforms collapse both inward & downward,which allows the two towers to swing inward to completely enclose the back, enabling it be a portable case; hence the name, "Take Along." The wooden beams on the roof serve as the handle.
There are stickers on the walls of the upper room, a coat-of-arms & a banner. A 3rd sticker was meant to go on the floor as a rug, but I wanted something I could use with other sets, so I attached the sticker to the back of the sheet the sticker was on, then cut it out with scissors to get something I could re-position & use elsewhere.
For the sake of the pictures, I've added these items not included in the set: the trees; goblet, candlesticks, feeding trough, & grass.