Heres an interesting map. It's a large island surrounded by water with lots of mountains. It has plenty of areas without aquifers. I haven't looked to see if it has any good volcano spots or anything like that (I haven't bothered to check since volcanos kind of suck right now due to them sticking up in the air) but it has lots of mountains with flux stone and sand and the like.
The interesting thing about the map is that there is a huge goblin civ in the northeast and the southeast. The northeastern one is composed mostly of elves (kidnap victims), and has been in constant war with the elves since the start, which is a kind of funny Elf v. Elf thing - I'm not sure if they would send elves to siege and kidnap your people or if it would just default to goblins since its technically a goblin civ (even if the elves did take it over).
The southeastern one is run by a winged demon. These guys immediately wiped out one of the dwarven civs and halfway wiped out another, and at around year 100 would probably have lots of dwarves as members (they led attacks against the other dwarf civ, but are killed off by the humans that are kidnapped in later years). Starting as the dwarven civ that was nearly wiped out has the goblins set to "At War" although I'm not entirely sure what that does. There are lots of interesting areas down near those goblin forts with sedimentary flux stones in combination with sand and nifty rock types like gabbro (for the diamonds) and obsidian. I was going to try out a game near the goblins and see how that went. I wonder if they siege you more when at war
Heres the map generation data:
[WORLD_GEN]
[TITLE:The Everlasting Realm]
[SEED:280522352]
[HISTORY_SEED:2690561990]
[NAME_SEED:4202679208]
[CREATURE_SEED:2229009010]
[DIM:129:129]
[EMBARK_POINTS:1500]
[END_YEAR:1050]
[BEAST_END_YEAR:200:80]
[REVEAL_ALL_HISTORY:1]
[CULL_HISTORICAL_FIGURES:0]
[ELEVATION:1:400:1600:1600]
[RAINFALL:0:100:200:200]
[TEMPERATURE:25:75:200:200]
[DRAINAGE:0:100:200:200]
[VOLCANISM:0:100:200:200]
[SAVAGERY:0:100:200:200]
[ELEVATION_FREQUENCY:4:1:1:3:2:1]
[RAIN_FREQUENCY:1:1:1:1:1:1]
[DRAINAGE_FREQUENCY:1:1:1:1:1:1]
[TEMPERATURE_FREQUENCY:1:1:1:1:1:1]
[SAVAGERY_FREQUENCY:1:1:1:1:1:1]
[VOLCANISM_FREQUENCY:1:1:1:1:1:1]
[TITAN_NUMBER:9]
[TITAN_ATTACK_TRIGGER:80:0:100000]
[DEMON_NUMBER:28]
[GOOD_SQ_COUNTS:6:63:0]
[EVIL_SQ_COUNTS:6:63:0]
[PEAK_NUMBER_MIN:5]
[PARTIAL_OCEAN_EDGE_MIN:0]
[COMPLETE_OCEAN_EDGE_MIN:4]
[VOLCANO_MIN:3]
[REGION_COUNTS:SWAMP:66:0:0]
[REGION_COUNTS:DESERT:66:0:0]
[REGION_COUNTS:FOREST:264:3:0]
[REGION_COUNTS:MOUNTAINS:2112:6:0]
[REGION_COUNTS:OCEAN:0:0:0]
[REGION_COUNTS:GLACIER:0:0:0]
[REGION_COUNTS:TUNDRA:0:0:0]
[REGION_COUNTS:GRASSLAND:528:2:0]
[REGION_COUNTS:HILLS:528:2:0]
[EROSION_CYCLE_COUNT:250]
[RIVER_MINS:25:25]
[PERIODICALLY_ERODE_EXTREMES:1]
[OROGRAPHIC_PRECIPITATION:1]
[SUBREGION_MAX:2750]
[CAVERN_LAYER_COUNT:3]
[CAVERN_LAYER_OPENNESS_MIN:0]
[CAVERN_LAYER_OPENNESS_MAX:100]
[CAVERN_LAYER_PASSAGE_DENSITY_MIN:0]
[CAVERN_LAYER_PASSAGE_DENSITY_MAX:100]
[CAVERN_LAYER_WATER_MIN:10]
[CAVERN_LAYER_WATER_MAX:90]
[HAVE_BOTTOM_LAYER_1:1]
[HAVE_BOTTOM_LAYER_2:1]
[LEVELS_ABOVE_GROUND:10]
[LEVELS_ABOVE_LAYER_1:6]
[LEVELS_ABOVE_LAYER_2:2]
[LEVELS_ABOVE_LAYER_3:2]
[LEVELS_ABOVE_LAYER_4:2]
[LEVELS_ABOVE_LAYER_5:2]
[LEVELS_AT_BOTTOM:1]
[CAVE_MIN_SIZE:5]
[CAVE_MIN_SIZE:5]
[CAVE_MAX_SIZE:25]
[MOUNTAIN_CAVE_MIN:5]
[NON_MOUNTAIN_CAVE_MIN:10]
[ALL_CAVES_VISIBLE:1]
[SHOW_EMBARK_TUNNEL:2]
[TOTAL_CIV_NUMBER:12]
[TOTAL_CIV_POPULATION:20000]
[PLAYABLE_CIVILIZATION_REQUIRED:1]
[ELEVATION_RANGES:1056:1056:528]
[RAIN_RANGES:528:1056:528]
[DRAINAGE_RANGES:528:1056:528]
[SAVAGERY_RANGES:528:1056:528]
[VOLCANISM_RANGES:528:1056:528]