Synchronize all Viewpoints.

In order to get this achievement you must synchronize all viewpoints in the game.

1. There are a total of 23 viewpoints in the game and do get this you must synchronize all of them.
2. Viewpoints are represented by eagle like symbol on your map.
3. Once you locate one go to it, climb to the top of the tower, go to the ledge and press B, you need to do this with all the viewpoints in the game.
4. There are a total of 21 in Paris and when you have done them you will have to quick travel back to Versailles as there are 2 there also. You can fast travel there via the small V icon outside Cafe Theatre.

This achievement does take a while to get as there is alot of travelling involved.
But once it has been done it unlocks fast travel spots so it is of benefit.

If you need any help feel free to PM me.