NSO can be reached by means of three routes as explained below. (Refer to coloured routes on Google Earth map).
From Valletta City Gate (on foot) - red line
From the Valletta city Gate, close to the main bus terminus, one can walk up to the Auberge de Castille and, taking the direction of Upper Barrakka Gardens, enter St Ursula Street at the corner adjoining the Department of Information. Follow the NSO sign and turn right, to descend a flight of steps to Lascaris, where the office is sited.
From Floriana (by car) - green line
From the Independence monument at Floriana, drive down Great Siege Road (Triq l-Assedju l-Kbir) past the Phoenicia Hotel gardens (on your right). At the fork of the road just past the Grand Hotel Excelsior, turn right (marked by an NSO signpost) and proceed to the War Rooms further inland. Park and walk through a long, narrow tunnel. NSO is located at the exit of this tunnel immediately past the War Rooms.
From Xatt il-Kurċifiss (by car) - yellow line
Drive up to Victoria Gate from Xatt il-Kurċifiss (Valletta ring road), by turning left on reaching the roundabout at the exit of the tunnel. Turn left again just before Victoria Gate and proceed further inland past the Housing Estate. Park and enter through the door to the right of the carpark boundary. NSO can be accessed by walking up the flight of steps to the left on exiting the entrance hallway.