Hag's End

Description
Hag's End is located at the top of the mountains northeast of Markath. The only access is through the Deepwood Redoubt. Inside there are plenty of Witches and a Hagraven. Additionally, Hag's End is home to one of the words for the slow time dragon shout which is found before the fourth round of battle with the Hagraven.

Battle with Hagraven
It will take four rounds, with the Hagraven retreating further into the redoubt after losing roughly a quarter health each encounter. In the last round it will summon two creatures to aid her - Frost Trolls, Ice Wraiths, Frostbite Spiders, Skeevers - based on your level. Note that combinations of the above creatures are also possible (example: one Frostbite Spider and one Skeever, etc.).

The last round can be made very easy if the player has the Unrelenting Force shout mastered. If approaching the Hargraven in Sneak mode, one can potentially avoid the summoned creatures completely (untested - the creatures might spawn regardless of the Hargraven!). A well-timed Fus-Ro-Dah will knock her off the platform and (due to her depleted health from the previous rounds) kill her instantly.

Notable Loot
To the right of the last altar at the exit of Hag's End, it is possible to reach the plateau at the top of the waterfall using the Whirlwind Sprint shout from the edge of the altar or by scaling the cliff from below. On top of the plateau the player can find a chest with various loot, and the Predator's Grace boots, which muffle movement and marginally increase stamina regeneration. Behind the player there is also a Quicksilver vein.
 * Bloodthorn, Elven Gilded Armor, Dragonscale Shield, Gold.
 * Draught of Waterbreathing.

Obtaining Slow Time Word Abnormally
The Slow Time word can be obtained without going through the dungeon. To the left of the proper entrance to Hag's End, there are some rocks next to the waterfall that are easily scaled. Once on top, it is trivial to then scale and hug up against the rocks leading to the top, exit area of Hag's End. The door up there leads to the room containing the word of power, effectively allowing you to skip the entire dungeon; however, you will not be able to go back through the dungeon in reverse unless you've already reached that point normally.

Quests

 * House of Horrors
 * Locate the Assassin of Old