Valtheim Towers is a location in The Elder Scrolls V: Skyrim. THese towers have been taken by Bandits. When you first cross here, you will be asked to pay a toll of 200 septims. If you pass a Speech or Persuasion check, then you can reduce the toll to 50 septims or avoid it.
The easiest way to avoid the toll is to ride through on a horse. Dialogue can't be started while someone is on horseback.
The Black Arrow, Book II (Archery Skill Book) is found in the tower with the Alchemy Lab, next to the bed.
These quests CAN lead you here: