You'll find Marr Branch on the right hand side of the road as you exit the gorge on Fayette Station Road. Marr Branch has a number of falls. They can be accessed by going up or down the creek. The main fall that most know and see is right beside the road on Fayette Station Road. There is also a smaller one just above. This is an easy falls to find, but not the easiest to get into the creek. It's not the easiest to shoot either. There are two ways to get down into the creek. One is from the road side and the other is to cross the creek above the falls and go down on the other side. There are some trails over there, but I have not been that way, though I did watch my friend go out that way. I used a rope to get in and out on the road side. It is not a particularly difficult scramble, but you might want a rope, especially with camera gear. It's kind of steep. The creek bed does have a few large boulders to shoot from but it's not completely hospitable.
There is way more to Marr Branch than this easy to access falls at the top which is roadside. If you are adventurous, start in at the bottom of Marr Branch and work your way up. It requires that you park and walk the railroad tracks along the river and then start heading uphill at Marr Branch. This adventure is not for the weak, lame, or lazy and will require some fortitude.
Marr Branch is also accessible by means of the trail leading from the bridge overlook located in the Bridgeview Estates.