[Tagging] artificial cave, historic military shelter

[Martin Koppenhoefer]

sent from a phone

> Il giorno 04 set 2016, alle ore 15:30, Richard <ricoz.osm at gmail.com> ha scritto:
> 
> For the touristy things something like amenity or tourism may be better.


tourism could occur at any of these places, but they are not set up for tourists (like hotels or beach resorts for instance), and many might be in gardens and parks without being a particular tourist attraction (because not often accessible). Maybe historic=grotto would suit for these. I just recall having one mapped here: http://www.openstreetmap.org/node/3496752463
"natural" more like in natural=water
but historic=grotto is maybe a better tag.

cheers,
Martin