Looking for ideas for a res project on hold!

Hmm...not sure I am on the same wavelength as you guys, but when I interpreted this inquiry I thought about a show that I have watched several times through over the years called Stargate....specifically SG-1. Reasoning...you want something to show in an instant that it is a teleporter of sorts. Nothing in my mind is as recognizable as a Stargate to accomplish feat. Here is a pic of one in some wooded area:



Since you are already wanting to do a nature theme anyways, I thought this might offer you some inspiration that you could work around. But then again...it may be way off base.. and out of this world sort of thing. Good Luck on your build...look forward to seeing what you come up with.