In summer, die kleine rote uses open scenic carriages on the Bernina railway, in regular scheduled train services.
Offene Aussichtswagen / Carrozze panoramici aperti / Vagun panoramic. Source: Wikimedia Commons
I used to enjoy those as a child, but I've never seen them anywhere else since. Are similar open carriages used in scheduled train services (thus not including museum railways or special events) anywhere else on Earth?