The Steed Stone (Skyrim)

Effect
The Steed gives a bonus of 100 extra carrying capacity and no movement penalty is received by armor. Armor also has zero weight when equipped.

Location
The stone is located directly north of the Statue to Meridia and west of Solitude in Haafingar's hills.

Trivia

 * The effects this stone grants is nearly identical to the Conditioning perk in the Heavy Armor skill tree, the Unhindered perk from the Light Armor skill tree and the Extra pockets perk in the Pickpocket skill tree.
 * When using The Steed it is possible to carry multiple copies of the same armor with no effect on total carry weight, even items with different enchantments (as long as they are the same base item). Wearing one of the items makes them all weigh nothing.
 * Using the Aetherial Crown in combination with The Steed Stone makes it possible to have a low-weight item that can be equipped to vastly increase carry weight.