Here you can find some usefull list of the several facilities you can find in a stone throw from Villa Costanzo!
Villa Costanzo is reachable even from Naples or Salerno by hydrofoils or Bus.
If you got a car you'll have to leave it in the parking situated in the centre of Positano and then keep going by feet for other 5 minutes.

Arriving from South you can drive on the Amalfi coast from Vietri sul mare and follow the coast driving through Cetara, Minori, Atrani, Amalfi and Praiano, along a narrow, winding and picturesque road. Arriving from North, take the A1 to Naples then take the Motorway A3 Naples-Pompeii-Salerno, take the exit Castellammare di Stabia, then follow the indications for Sorrento-Positano-Amalfi.
Land at Capodichino International Airport in Naples. Upon request, a taxi will come to pick you up and whisk you to Positano in approximately one hour and a half.
From South arrive at the railway station of Salerno, then you can decide either to take a taxi, a Sita line bus or a hydrofoil. From North arrive at the Central, Piazza Garibaldi and Mergellina railway station in Naples, then you can take a Taxi, a SITA line bus, the train to Sorrento (Circumvesuviana – Naples-Sorrento line – inside the Garibaldi Railway Station) SITA line bus from Sorrento to Positano
From Salerno (via Amalfi), from Sorrento, from Capri, or from Naples Beverello or Mergellina ports.
The map below provided by Google, it's really simple to use:
-To zoom in or out the map, use the relative buttons "+" and "-".
-To change the map center you can use the 4 arrows on the top left o the map.
-On top right of the map there are 3 buttons to change the map type to view, it is possible to choose between Road Map, Satellite , o Terrain.
-To display informations about Villa Costanzo click the blu icon.