Seed - NGG
This seed makes you a waterfall at the top of a cliff and the landscape is really cool.
Seed - Stockholm
This seed makes a 5 square waterfall.
Seed - vicious
This seed makes a floating island with a waterfall flowing down from it.
Seed - lava
This seed makes a tons and tons of water.
Seed - patato
This seed makes a gigantic cave filled with water.
Seed - 178
This seed makes tons of islands which is good to make private island.
Seed - sewsewsewsewsew
This seed makes some cool water falls falling into a big lake and some cool floating blocks.
Seed - nyan-
This seed puts you on an island surrounded by water, you can go through water for a while before you reach more land.