Kato's Falkreath overhauls Falkreath, a city that's located in Falkreath Hold in the southern part of Skyrim near the Jerall Mountains. Beautiful place.
This mod improves the look and feel of the city with new items and a different look for some of the key areas in town.
There are new paths, new buildings, a neat little bridge that runs across the water, and a whole lot more. You can get a feel for those changes in the video below.