To ensure success and transport safety please note:
More information about the mole-hole-system: http://geokrety.org/molehole.php
By the way: the opposite GeoKretExpress Gdańsk - Berlin is running from Mole-hole Wannsee.
How to get to the mole-hole
Find dig in concrete pile and go about 3 m on the left (with the bridge ahead). The mole-hole is covered by a stone. Do not dig! Do not take out the pipe!