Thank you for so many excellent ruined buildings. HM's, in no particular order:
Marat's soaring arches:
Jarek's lonely B&W shack:
Marcel's Tasmanian Church
3rd Place:
Markus' barn
2nd Place
Jola's Basilica
1st Place
Ken's beautiful light on Eilean Donan Castle in Scotland:
Back to you, Ken!