Imagine yourself gardening: Oops! A bunker!
This happened in IJmuiden to the family Van Koot. They were arranging a car trailer when wheels hit a concrete edge. Of a bunker! From WW II. After 11 years that the family was living there. The Haagse Bunker Ploeg has excavated the ammunition bunker, which is accessible now. Below their Facebook pics.
(Source: Facebook Haagse Bunker Ploeg)