The site I'm thinking of is an old caravan inn, a kind of travellers' rest house, on the old trade road in the north of Vietnam, near the border province where my grandparents live. Most people don't know about it, which is part of the problem.
It's a large square building made of stone and dark wood, built around a central courtyard where merchants used to keep their horses. It's probably three or four hundred years old. When I first saw it as a teenager it was already in a bad way, and when I went back last year, I was honestly shocked.
Part of the roof has fallen in, so rain gets inside and the wooden pillars are starting to rot. Local people have taken some of the stones to build walls, and someone has painted advertisements for a motorbike repair shop across the front. There's no sign explaining what it is, and goats wander in and out freely.
I think a few things should be done. First, the provincial government needs to officially register it as a protected site, so nobody can take the materials. Then the roof urgently needs repairing, even with a simple temporary cover, before the rest of the wood is lost. I'd also like to see a small information board and maybe a guide from the village, because if local people earned a bit of money from visitors, they'd have a reason to look after it. I'm a history teacher, and I'd love to bring my students there one day, but at the moment it's honestly too dangerous to go inside.