There are off-roaders that are totally capable of wading through rivers and crossing rocks, then there's this: the GPV Colonel 8x8. It's pretty much an armoured personnel carrier, and it can roll over vans or any other cars as if they were fog banks. Yes, you read that correctly.
This road-legal 8x8 has the capability to cut down 12-inch thick walls. So, landslides and lava floods aren't going to be a problem.