"Love locks" nearly destroyed a footbridge in France after decades of tourists adding to it, so now folks are leaving "love locks" on mountain paths and at national parks instead. Fastening it to a railing, locking it and throwing the key into the chasm as a symbol of their commitment. Other couples latch on and repeat.

Park rangers are cutting them off now. The keys being the worst part: endangered bird species who scavenge canyons are finding the keys and getting injured.

So stop it. Yes, we are impermanent people seeking to make something permanent that outlives us. Find a better way to do it if you must, but the best physical option that doesn't harm the environment is doing nothing at all.

https://www.backpacker.com/news-and-events/news/love-locks-grand-canyon-california-condors/