Blink and I were killing each other one day in mulch_dm when Blink says "Hey, I got a cool idea for a DM level". I'm like "Ok, so do I, we'll make 2 different arenas" "OK!"
The Lava arena was Blink's idea, with a cool gothic look I gave it. It's a regular 'ol dm level, though I've seen some whiley devils Rocket Jump to the Flying Buttress' and Fire off Grenades from there.
The Aztec looking level isn't your standard DM level, which anyone playing in it should be able to figure out. Those Floor Tiles serve a purpose ;)