In the Wyoming and Montana (Yellowstone) area we call these people "tourons" (tourist morons). Sitting on a priceless piece of art or petting a giant bison, it all comes from the same place. Profound stupidity driven by an unhinged sense of privilege.
I saw one where a lady jumped a guard rail and nearly stumbled and fell into the boiling hot spring she was trying to touch. Because I guess the steam and radiant heat wasn’t enough to tell her it was really fucking hot?
I did find the one I was thinking of too, I remembered her stumbling around more but she just sorta clumsily sits down next to it (which isn't a great idea either): https://www.instagram.com/p/CtuCmrJAwk6/ (sorry for the insta link)