Secret map is a small cache with a logbook. Bring your own pen.
The cache has two stages. The given coordinates will lead you to Stage 1 where you will find a secret map which will show you the way to Stage 2. In order to log the cache you should find the logbook in Stage 2. You will need a special tool to view the map. So bring your toolbox. There is a chance you might not have the tool, though. This is all I can give you as a hint, this is a challenge cache, hence the difficulty level. I hope you enjoy this old style map.