Here's the trailer for an interesting new Skyrim mod: Project AHO:

Project AHO

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Project AHO - is a large quest modification, in size, comparable to a medium sized DLC. In this expansion, you will get acquainted with the history and inhabitants of Sadrith Kegran - a hidden settlement of Great House Telvanni, built on the ruins of a great Dwarven city. Uncover the secrets of the most grand Dwemeri invention - Aetherium Hyperspace Observatory.