From The TimeSplitters Wiki

The Mexican Mission covers up most of the level, the rest of the level has an outdoor area with some adobe houses that provides protection from bullets and some consider it to be the "dust" of TimeSplitters. The mission itself features 3 levels, a ground area, a top level with a courtyard in the middle of both which you can drop down into; and a cellar. It also features and Easter Egg similar to the Chinese gong, this map has a bell which can be shot to sound.

There are some slight differences between the TimeSplitters 2 version of the map, and the TimeSplitters: Future Perfect version. The Health packs have changed places, and the map looks slightly less brighter.