Denotes a hotel

Denotes an apartment. Usually part of a property restored specifically for holiday lets. The second symbol simply means that there are too many apartments to detail specifically.

Denotes an agritourism concern. Increasingly popular, you will be staying, more often than not, on a working wine or olive oil estate.

Rooms available. Not in a hotel and, like most rental accommodation, a minimum of one week stay usually applies. Often mixed with apartments on the same property, this denotes sleeping space only - no private kitchen, living room, etc., although there may be communal ones.

Denotes bed and breakfast accommodation.

Sleeping capacity of the rental property (villa, farmhouse, whatever).
The '+' next to a number means that there may be the possibility of extra bed-space, be it a sofa-bed, an extra bed brought-in for your stay, or just an extra room made available.