Szemlőhegy Cave
It is an underground cave visited on guided tours at fixed times: you do not go in when you like and you do not wander on your own. Inside the temperature stays low and constant all year, so even at the height of summer you need a sweatshirt and closed shoes. It sits on the Buda hills, outside the centre, reached on city transport: that is why there is almost nobody there, and it is the reason to go.
