Location Reports Search for a location No results found Underground, Wales 🏴 GRONK 26/06/2026 Underground, Wales 🏴 GRONK 26/06/2026 Henddol Slate Mine, Fairbourne Read More Underground, England 🏴 GRONK 17/06/2026 Underground, England 🏴 GRONK 17/06/2026 West Precinct Goods Yard, Stoke on Trent Read More Underground, England 🏴 GRONK 01/06/2026 Underground, England 🏴 GRONK 01/06/2026 Spinkhill Tunnel, Sheffield Read More Underground, Wales 🏴 GRONK 23/02/2026 Underground, Wales 🏴 GRONK 23/02/2026 Ystrad Einon Copper Mine, Ceredigion Read More Underground, England 🏴 GRONK 10/02/2026 Underground, England 🏴 GRONK 10/02/2026 Werneth Tunnel, Oldham Read More Underground, England 🏴 GRONK 10/02/2026 Underground, England 🏴 GRONK 10/02/2026 Central Tunnel, Oldham Read More Underground, England 🏴 GRONK 10/02/2026 Underground, England 🏴 GRONK 10/02/2026 Butterhouse Tunnel, Oldham Read More Underground, England 🏴 GRONK 19/01/2026 Underground, England 🏴 GRONK 19/01/2026 Stockton Brook Tunnel, Stoke-on-Trent Read More Underground, England 🏴 GRONK 19/01/2026 Underground, England 🏴 GRONK 19/01/2026 Fenton Manor Tunnel, Stoke-on-Trent Read More Underground, England 🏴 GRONK 19/01/2026 Underground, England 🏴 GRONK 19/01/2026 Mow Cop Tramway Tunnel Read More Underground, England 🏴 GRONK 19/01/2026 Underground, England 🏴 GRONK 19/01/2026 Sherwood Rise Tunnel, Nottingham Read More Underground, England 🏴 GRONK 04/01/2026 Underground, England 🏴 GRONK 04/01/2026 Harecastle (South) Tunnel, Kidsgrove Read More Underground, England 🏴 GRONK 31/12/2025 Underground, England 🏴 GRONK 31/12/2025 Clayton Tunnel, Bradford Read More Underground, England 🏴 GRONK 31/12/2025 Underground, England 🏴 GRONK 31/12/2025 Lee Bank Tunnel, Halifax Read More Underground, England 🏴 GRONK 30/12/2025 Underground, England 🏴 GRONK 30/12/2025 Soothill Tunnel, Batley Read More Underground, England 🏴 GRONK 28/12/2025 Underground, England 🏴 GRONK 28/12/2025 Redmires Reservoir Plug Hole, Sheffield Read More Underground, England 🏴 GRONK 22/12/2025 Underground, England 🏴 GRONK 22/12/2025 Lydgate Tunnel, Saddleworth Read More Underground, England 🏴 GRONK 07/12/2025 Underground, England 🏴 GRONK 07/12/2025 Knutsford ROC Post Read More Leisure, Underground, Wales 🏴 GRONK 30/11/2025 Leisure, Underground, Wales 🏴 GRONK 30/11/2025 Grange Cavern Military Museum, Holywell Read More Underground, England 🏴 GRONK 26/11/2025 Underground, England 🏴 GRONK 26/11/2025 Miley Tunnel, Preston Read More Older Posts
Underground, Wales 🏴 GRONK 26/06/2026 Underground, Wales 🏴 GRONK 26/06/2026 Henddol Slate Mine, Fairbourne Read More
Underground, England 🏴 GRONK 17/06/2026 Underground, England 🏴 GRONK 17/06/2026 West Precinct Goods Yard, Stoke on Trent Read More
Underground, England 🏴 GRONK 01/06/2026 Underground, England 🏴 GRONK 01/06/2026 Spinkhill Tunnel, Sheffield Read More
Underground, Wales 🏴 GRONK 23/02/2026 Underground, Wales 🏴 GRONK 23/02/2026 Ystrad Einon Copper Mine, Ceredigion Read More
Underground, England 🏴 GRONK 10/02/2026 Underground, England 🏴 GRONK 10/02/2026 Werneth Tunnel, Oldham Read More
Underground, England 🏴 GRONK 10/02/2026 Underground, England 🏴 GRONK 10/02/2026 Central Tunnel, Oldham Read More
Underground, England 🏴 GRONK 10/02/2026 Underground, England 🏴 GRONK 10/02/2026 Butterhouse Tunnel, Oldham Read More
Underground, England 🏴 GRONK 19/01/2026 Underground, England 🏴 GRONK 19/01/2026 Stockton Brook Tunnel, Stoke-on-Trent Read More
Underground, England 🏴 GRONK 19/01/2026 Underground, England 🏴 GRONK 19/01/2026 Fenton Manor Tunnel, Stoke-on-Trent Read More
Underground, England 🏴 GRONK 19/01/2026 Underground, England 🏴 GRONK 19/01/2026 Mow Cop Tramway Tunnel Read More
Underground, England 🏴 GRONK 19/01/2026 Underground, England 🏴 GRONK 19/01/2026 Sherwood Rise Tunnel, Nottingham Read More
Underground, England 🏴 GRONK 04/01/2026 Underground, England 🏴 GRONK 04/01/2026 Harecastle (South) Tunnel, Kidsgrove Read More
Underground, England 🏴 GRONK 31/12/2025 Underground, England 🏴 GRONK 31/12/2025 Clayton Tunnel, Bradford Read More
Underground, England 🏴 GRONK 31/12/2025 Underground, England 🏴 GRONK 31/12/2025 Lee Bank Tunnel, Halifax Read More
Underground, England 🏴 GRONK 30/12/2025 Underground, England 🏴 GRONK 30/12/2025 Soothill Tunnel, Batley Read More
Underground, England 🏴 GRONK 28/12/2025 Underground, England 🏴 GRONK 28/12/2025 Redmires Reservoir Plug Hole, Sheffield Read More
Underground, England 🏴 GRONK 22/12/2025 Underground, England 🏴 GRONK 22/12/2025 Lydgate Tunnel, Saddleworth Read More
Underground, England 🏴 GRONK 07/12/2025 Underground, England 🏴 GRONK 07/12/2025 Knutsford ROC Post Read More
Leisure, Underground, Wales 🏴 GRONK 30/11/2025 Leisure, Underground, Wales 🏴 GRONK 30/11/2025 Grange Cavern Military Museum, Holywell Read More
Underground, England 🏴 GRONK 26/11/2025 Underground, England 🏴 GRONK 26/11/2025 Miley Tunnel, Preston Read More
