Just remembering the old days of playing Minecraft, when you could find a seed that had massive mountains with deadly cliffs, endless tall forests and huge cave systems above ground.
All the servers I see now have biomes that aren't nearly as cool! Extreme hill biomes aren't as bulking and massive as they were too. Is there a survival server out there that still maintains old-fashioned seeds with epic mutated landscapes? It made house-making and survival so much more exciting.
There's still terrain of the type you described, but you probably will have a low chance of finding one, as such terrain is rare. But, on the other hand, you can create an AMPLIFIED world type, a world type in which terrain is EXTREMELY mountainous and steep, or you can create a Customized world type and create your own world, where you can control many aspects of terrain generation, such as mountain heights, sea level, lava lakes/oceans, and mountain frequency (how often a mountain will occur).