Crashed century ships that you can fly through like (shamelessly) the Superstar Destroyer in the Star Wars trailers.
I already did: https://forums.frontier.co.uk/showthread.php?t=174343&page=2&p=2683129&viewfull=1#post2683129
That planet captured my attention in a short exploration travel, the very close proximity to the blue star, the ring, the magma, the color... pretty awesome.
Here is another pic:
http://images.akamai.steamuserconte...182/544B841A25E9B979FCDBDB2711E8F0900B505D0E/
Rescue on Fractalus mini-game.
Seriously, those suggestions of yours are all really good. I like the idea of geysers that shoot up into the sky, then are whipped away at 90 degrees by the solar wind.
That could actually be pretty fun! Rescuing guys who ditched their destroyted SRV's weeks ago and are trecking across the landscape awaiting salvation.