When you arrive by train at Konigstein, the fortress is visible on the top of the mountain.
Top can be reached by tourist bus, which runs from 10 am, or by local bus from the stop Reissiger platz, Konigstein to Am Mittelweg (then to the tunnel under the road and 15 minutes walk up), find the schedule on bahn.de. At the moment you walk through the woods, but if we look at the picture of Canaletto (1756-1758), we see bare slopes, what is logical from the defensive point of view.
If you decide to go upstairs by foot it will take at least 45 minutes.
Walls of the fortress can be reached in two ways: on foot or by lift, which is located inside the rock. Lift is near the parking lot and the main entrance is on the other side of the fortress. The best way is to go up by lift and go down through the main entrance.
There are museums and restaurants on the territory, but the most interesting is a walk along the walls around the fortress, it will take about an hour.
Purpose of this tower is unknown
Along the way, you can eat traditional German food
Local lemonade reminds that we are in eastern Germany
There is also a castle with museum
And even real forest
In the middle of the fortress is the second deepest well in Europe (152.5 m).
Getting there: Train S1 from Dresden to Konigstein (Saechs Schw). Further upward either on foot or on the tour bus or the local bus stop Reissiger platz, Konigstein to Am Mittelweg, find schedule here bahn.de.