idk what website u're talking about but you could probably find lots of the maps on gamebanana,
i dont got css but here's a good list of the previous maps on the jb csgo server, there's probably more which I can't remember which haven't been published to gamebanana/workshop. If you want a more comprehensive list than this then ask jacko or someone like that.
Code:
jb_akasa
jb_alien
jb_america
jb_amongus
jb_arcade
jb_atomic
jb_augment
jb_august
jb_autumn
jb_avalanche
jb_bigmt
jb_bignuts
jb_carceris
jb_cavern
jb_chicken_island
jb_clouds
jb_coldcampus
jb_cubeworld
jb_divninity
jb_dust2
jb_dystopian
jb_fentex
jb_hogwarts
jb_jailberd
jb_kwejsi
jb_laboratory
jb_lego_jail_2k17
jb_legobels
jb_longstreet
jb_lost_planet
jb_marioworld
jb_mist
jb_mlcastle
jb_moonjail
jb_moti2
jb_oasis
jb_obama
jb_overcooked
jb_paradise_lost
jb_peanut
jb_pleaseworkv420
jb_pyrenees
jb_quad
jb_quake
jb_renegade
jb_scp
jb_seascape
jb_sg_dojo
jb_shapeshifter
jb_shiver
jb_sonic
jb_spy_vs_spy
jb_umbrella
jb_undertale
jb_vice
jb_vipinthemix
jb_void
jb_winterwonderland
jb_zero
jb_prison_architect
jb_tropico
jb_temple_studios
jb_pipeline
ba_jail_prison_m
ba_jail_canyondam
ba_jail_minecraftparty