(netherlands)
Coordinates: 52.05244782121218, 5.545087232044112
Area: 1.41376953125e-05 km²
OSM tags:
abandoned:building: bunker
architect: Ministerie van Oorlog
building:material: concrete
bunker_type: pillbox
heritage: 2
heritage:operator: rce
historic:period: 1939 - 1956
military: bunker
model: S3A-type kazemat, bijnaam "Stekelvarken"
note: Grebbelinie
ref: GL135
ref:rce: 528613
website: https://www.bunkerinfo.nl/2016/02/grebbelinie-s3a-kazemat-gl135.html