The hardest part of creating lifelike mountains is just starting.
Seriously, grab some polystyrene, glue it in layers to desired height, then hack away with a hot wire cutter.
Cast some rock outcroppings (woodland scenics)
Next difficult part is making the plaster rocks fit. Easy – just snap pieces off with a set of pliers and carry on. Filler, flock, paint, fill, flock and paint again. Done!
All Trees are magnetized to allow them to be swapped around and other similar sized items be added instead (communication towers perhaps?)
This is a whole lot of fun and you can be done in a weekend (with drying times etc)
Give it a try!