It does not appear on google maps because it is not passable by vehicles. So if you are using GPS, navigate to Parcheggio, Strada della Ligussa. This is the address google maps uses for the car park:
Str. della Ligussa, 5, 22010 Acquaseria CO, Italy
Driving from Switzerland
Turn left at Porlezza and head for Menaggio. There is a big Iperal supermarket just past Porlezza, so if you want to do a big shop we recommend a stop here.
Descend towards Menaggio with several hairpin bends but turn left at the roundabout following signs for Sondrio. This puts you on the road into Acquaseria (see below*). Turn left opposite Bar Carlo.
Driving from Milan Malpensa Airport
Driving from Bergamo Airport – ferry route
From the ferry, turn right onto the road and bear right at the traffic lights, keeping the Banca Intesa San Paolo to your left. Then keep straight. You will pass a big church on your left where the steps come right down to the road. You will go out of Menaggio through an old tunnel into Nobiallo. After Nobiallo the road filters on to the highway. After some short tunnels you come out into San Siro/Acquaseria village. Over the last tunnel you see a sign saying ‘Attenzione: zona abitata al fine galleria’.
The road bends left slightly and you are in the village. Turn left opposite Bar Carlo. Follow the road bearing right up the hill to the small car park by the bridge.
Driving from Bergamo Airport – round the lake
You will cross over the river Adda. After the river take the left turn at the roundabout, signposted Menaggio. Crossing the river Mera the road bends to the left and then follows the lake down to San Siro/Acquaseria. Turn right opposite Bar Carlo. Follow the road bearing right up the hill to the small car park by the bridge.