The mods Biomes O Plenty and Oh the biomes we've gone add hundreds of new biomes to the game, allowing the player to explore much more than in a normal vanilla minecraft world.
Alex' Mobs and Naturalist bring in many new mobs to see, tame, or fight.
Blue Skies, The Aether, Twilight Forest, and the Undergarden mods allow the player to explore new dimensions and also encounter new mobs and biomes.
There are many other areas to explore as well, such as the magic aspects of the Botania mod, the food aspect of the Pam's Harvestcraft mod, and the mechanical side of the Mekanism mods.
There are countless opportunities for the player to find new and exciting things to do with this modpack that is not possible in vanilla Minecraft.

