Lighted arches made out of inch PVC pipe held in place by 3 foot rebar stakes. Each arch is 10 feet tall and 8 feet wide with 300 lights on each. Even without the lights this is an interesting project.
What I do is get around 5 small 2 by and simply drive them into the ground at an angle so they are all touching at the top like a small tree. Then I easily put the lights around the post's and plug them in and there is your tree.