xc in the arena?

As you might have figured out, I kinda have a thing for creative and interesting jumps - especially if there's a DIY aspect. So today I'm curious specifically about cross country style jumps that can be set up in the arena (or that are at least light weight enough to be moved around).

"table" from OF

Really it was this table from OF that got me really thinking about it. Trainer P used the plywood 'liver pool' to create a ramped table top by resting it on wooden boxes and a jump pole. Super clever, right? Seems easy enough to recreate too, esp since you get bonus liver pool and boxes out of the deal. 

"corner" - also from OF

This little pedestal has stayed on my mind ever since jumping this 'corner' over the summer. Again, it seems easy enough to build - tho I've also seen people just use a barrel or whatever else to rest the poles on. Also, trainer P wanted to cut more plywood in a triangular shape to create a top surface for this jump.

another corner - this time from Nicky Hill Eventing

And then I saw this picture (uh, used without permission, so if anybody from Nicky Hill Eventing is upset that I'm using it.... well, just lmk and I'll pull it down!) which strikes me as super awesome. My first reaction is: omg I need to go to the woods and collect every single twisted pole-sized branch I can find!!! And second of all, look at that adorable bench! 

simple enough brush fence! (source)

This is another pic from the google - just a plain old brush ramp. The construction looks light weight enough that you could easily move it around the arena - or even out to the jump field for practice. Or, if actually building out the ramp bit seems too arduous, perhaps it could just be another gate that can either lean on stuff or hang as it's own jump? 

brush boxes remain brush-less

The stuff I've already built might be able to be repurposed for a more 'cross country' effect too. Like these little brush boxes, tho I'm not entirely sure what the best setup might be.

lattice gate! could be... lattice table? 

The lattice gate maybe has more potential - it could lean on top of stuff or create a spooky table top or something, maybe?? Lol idk, really. I'm also still hopeful that people with actual power tools will eventually finish cutting out the pieces for my wanna-be chevron!

Mostly I guess I'm just trying to brain storm here. I would love to build out our variety of jump options at the farm, especially with obstacles that can stand on their own or that can be adjusted to different heights. The more visually unique, the better.

What materials have you used to build out fun and interesting jumps? Or have you ever seen anything that really caught your eye? Or if you had unlimited time/resources/whatever, what types of obstacles would you want to make?