Explore one of the most fascinating nazi defence line. Your driver will meet you at your hotel and then you can enjoy 2,5h ride throw beautiful polish country side. On the place you will learn why in 1930's Germans wre afraid of Poland and you go under the ground for at least 1h walk.
The tour of bunkers takes around 1-1,5 h but sometimes they extend it up to 2h. On the place you can rent audio guides.