Google Earth is the easiest and quite good, here is a site I recommend for everyone. You can see topo maps and aerial photos and also see where mineral leases and a bunch of other stuff occur. Zoom into the area you want and click on whatever type of aerial photo or topo you want. This is updated pretty regularly thru the state
http://sonris-www.dnr.state.la.us/gis/sonris/viewer.htm