Infinite planes of chaotic evil madness? Sure, let's go!
Here is a handy table for creating your own Abyssal realm.
Roll d20 (or roll twice and combine the result)
1- Air-dominant—zero gravity, crags drifting through raging storms.
2- Ash—blowing dunes of ashes
3- Battleground—Blood War or other massive, brutal conflict
4- City—warrens and slums to citadels and palaces, teeming with demons
5- Earth-dominant—solid rock tunneled by the inhabitants
6- Fire-dominant—everburning flames with salamanders, etc.
7- Delusion—appears to be Normal but the flowers are poisonous or the trees attack
8- Desert—endless tracts of black, white, or red sand with no water
9- Glacier—infinite black, white, or orange ice with few rocky peaks breaking the surface
10- Hellscape—a burning mix of magma, rock, and belching brimstone
11- Maelstrom—swirling, bubbling chaos like Limbo
12- Mountainous—rocky crags, precipitous cliffs, soaring peaks
13- Negative-dominant—A void or bleak rocks floating in space
14- Normal—similar to a Prime plane with various nasty flora and fauna
15- Ocean—a trackless ocean, with a surface
16- Salt—crystalline badlands or desert
17- Sea—of acid, blood, garbage, insects, oil, or worms, etc.
18- Swamp—noisome bog inhabited by predators
19- Undead—specters, spooks, and ghosts in endless crypts
20- Water-dominant—nightmarish creatures in the bottomless murk