One of the outstanding relics on the island is the Tunnel system designated Ho8. It goes on for MILES and is full of stuff.
It was built using Russian slave labour and other 'hired' labour. It was quite a sight !
The pic of the motorbike and Kubelwagon are for Ade
Please note the hammer. This was in the ceiling of the main entrance. One of the workers must have dropped it when they began to pour the cement and it has been there ever since....20 feet up...in the ceiling