Installed hexxit, but a few mods aren't showing in game.

[Crusadermercutio]

Battle towers are definitely not showing up for starters. Secondly the only thing it updated it seems was new items and the menus.

[oO_BUBBLES_Oo]

Is it a new world? It sounds as if you loaded an old world. If that is indeed the case, you need to either make a new one, or travel far enough in your old world that you generate new chunks. Battle towers and all the other objects that the mods place won't show up in previously loaded chunks (they generate WITH the terrain, not after).

[Crusadermercutio]

i made a new world in sp and their seems to be black waterfalls, and rift worlds. Other than that no tours or unique biomes in sight. In the in game mod section it doesn't say a few like the chocobo as well isnt there and unique biomes i believe isnt either.