A man explores abandoned air raid bunkers in the woods, where he discovers a concrete slab with a hole in each bunker. He suspects the slabs might be covering tunnels, drainage systems, or storage spaces. After investigating multiple bunkers, he finds that each has a similar slab with holes, which he believes are likely for drainage purposes. He uses a nail and paracord to lift one of the slabs, revealing a small, brick-lined space with gaps, possibly for drainage. He concludes that the spaces are likely for drainage, but leaves room for alternative theories.
Here are the key facts extracted from the text:
1. The narrator discovered an underground air raid bunker style shelter in the woods about two weeks ago.
2. The narrator stayed in the shelter for 24 hours, using a wood stove to keep warm and a hammock to sleep.
3. The narrator found a concrete slab with a hole in it at the entrance of the shelter.
4. The narrator tried to lift the slab but couldn't, and suspected there was a compartment underneath.
5. The narrator knows of three or four bunkers in the woodland.
6. The narrator wondered if the hole in the slab could be a tunnel connecting the bunkers or drainage to prevent flooding.
7. The narrator returned to the shelter with tools to investigate the hole.
8. The narrator explored other bunkers in the woodland and found similar concrete slabs with holes.
9. The narrator suspects that the holes in the slabs may be for drainage.
10. The narrator used a paracord and a nail to try and lift the slab.
11. The narrator successfully lifted the slab and found a small, brick-lined compartment underneath.
12. The compartment had gaps in the brickwork and was filled with loose gravel.
13. The narrator believes the compartment was likely used for drainage.
14. The narrator found that the other bunkers also had similar concrete slabs with holes, but not all of them had a slab.
15. The narrator plans to explore the other bunkers further in the future.