Pipes

[Arkham Lykoi]

Keyword being "well-sheltered," I think they'd be fine. Glass is pretty durable and while nature might grow in all around it, I don't think much would wear down the glass itself as long as it doesn't fall from high places or get tossed around in moving/large bodies of water. I mean, we still have a bunch of glass art pieces and artifacts from centuries ago, so.