7 Hours UNDERGROUND - Exploring an Abandoned Slate Mine -N.Wales uk -
1:55:25
Maenofferen Slate mine, Blaenau Ffestiniog, North Wales
47:44
Britain's Pompeii: The Medieval Town Perfectly Preserved Under Tons Of Sand
22:24
Exploring an Underground Mine (THE DEEPEST I’VE BEEN)
41:17
Wales's ABANDONED INSANE ASYLUM! Over 6000 People Died Here!
15:21
Exploring Ancient places - A church inside a Cave, Anchor church, Ingleby
1:13:54
Worlds Largest Slate Mine MAENOFFEREN PT1 OF 3
18:16
This Strange Structure on Google Earth Needs Investigating – Let’s Hike to It!
21:36