Generated a custom world, embarked on a site, and found that it has some amazing, epic features, including: 3 major and a minor river intersecting, the largest major river producing a 16+ z-level waterfall into an enormous canyon, and two tall cliffsides, one next to, the other inbetween the rivers. Has sand, clay, a generous amount of obsidian near the surface, marble in the lower left area, a lot of trees and some potatoes and blueberries.
EDIT:
All trees are larch
The rivers freeze from mid-autumn to mid-spring, helping the FPS and water project construction
Download:
Worldgen raws (43.03):
[WORLD_GEN]
[TITLE:NEW]
[SEED:WZ2bMZ9LouHAKgM5SFMy]
[HISTORY_SEED:RePhWGIoFHQJEtBxidxE]
[NAME_SEED:Pin5uTXoMtC0kRjw9ftp]
[CREATURE_SEED:JRsrEKgwmaCD9a1zgs8Q]
[DIM:257:257]
[EMBARK_POINTS:2400]
[END_YEAR:110]
[BEAST_END_YEAR:300:80]
[REVEAL_ALL_HISTORY:1]
[CULL_HISTORICAL_FIGURES:1]
[ELEVATION:1:400:2000:2000]
[RAINFALL:0:100:800:800]
[TEMPERATURE:25:75:800:800]
[DRAINAGE:0:100:800:800]
[VOLCANISM:0:100:800:800]
[SAVAGERY:0:100:800:800]
[ELEVATION_FREQUENCY:1:1:1:1:1:1]
[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]
[POLE:NORTH]
[MINERAL_SCARCITY:500]
[MEGABEAST_CAP:75]
[SEMIMEGABEAST_CAP:150]
[TITAN_NUMBER:33]
[TITAN_ATTACK_TRIGGER:80:0:100000]
[DEMON_NUMBER:52]
[NIGHT_TROLL_NUMBER:26]
[BOGEYMAN_NUMBER:26]
[VAMPIRE_NUMBER:26]
[WEREBEAST_NUMBER:26]
[SECRET_NUMBER:52]
[REGIONAL_INTERACTION_NUMBER:52]
[DISTURBANCE_INTERACTION_NUMBER:52]
[EVIL_CLOUD_NUMBER:26]
[EVIL_RAIN_NUMBER:26]
[GENERATE_DIVINE_MATERIALS:1]
[GOOD_SQ_COUNTS:100:1000:2000]
[EVIL_SQ_COUNTS:100:1000:2000]
[PEAK_NUMBER_MIN:50]
[PARTIAL_OCEAN_EDGE_MIN:2]
[COMPLETE_OCEAN_EDGE_MIN:0]
[VOLCANO_MIN:15]
[REGION_COUNTS:SWAMP:1032:0:0]
[REGION_COUNTS:DESERT:0:0:0]
[REGION_COUNTS:FOREST:0:0:0]
[REGION_COUNTS:MOUNTAINS:0:0:0]
[REGION_COUNTS:OCEAN:0:0:0]
[REGION_COUNTS:GLACIER:0:0:0]
[REGION_COUNTS:TUNDRA:0:0:0]
[REGION_COUNTS:GRASSLAND:0:0:0]
[REGION_COUNTS:HILLS:0:0:0]
[EROSION_CYCLE_COUNT:400]
[RIVER_MINS:800:200]
[PERIODICALLY_ERODE_EXTREMES:0]
[OROGRAPHIC_PRECIPITATION:1]
[SUBREGION_MAX:5000]
[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:0]
[CAVERN_LAYER_WATER_MAX:100]
[HAVE_BOTTOM_LAYER_1:1]
[HAVE_BOTTOM_LAYER_2:1]
[LEVELS_ABOVE_GROUND:20]
[LEVELS_ABOVE_LAYER_1:10]
[LEVELS_ABOVE_LAYER_2:1]
[LEVELS_ABOVE_LAYER_3:1]
[LEVELS_ABOVE_LAYER_4:1]
[LEVELS_ABOVE_LAYER_5:16]
[LEVELS_AT_BOTTOM:2]
[CAVE_MIN_SIZE:400]
[CAVE_MAX_SIZE:500]
[MOUNTAIN_CAVE_MIN:400]
[NON_MOUNTAIN_CAVE_MIN:700]
[ALL_CAVES_VISIBLE:1]
[SHOW_EMBARK_TUNNEL:2]
[TOTAL_CIV_NUMBER:40]
[TOTAL_CIV_POPULATION:15000]
[SITE_CAP:1500]
[PLAYABLE_CIVILIZATION_REQUIRED:1]
[ELEVATION_RANGES:0:0:0]
[RAIN_RANGES:0:0:0]
[DRAINAGE_RANGES:0:0:0]
[SAVAGERY_RANGES:0:0:0]
[VOLCANISM_RANGES:0:0:0]
Location on the world map:
Screenshot of the top of the waterfall, and the cliffs: