take tram No. 10 (in the direction of Flughafen) from the tram stop Bahnhofplatz/HB to the tram stop ETH/Universitätsspital; walk up Schmelzbergstrasse to the Semper Observatory; or: take tram No. 6 (in the direction of Zoo) from the tram stop Bahnhofstrasse via Central to the tram stop ETH/Universitätsspital; walk up Schmelzbergstrasse to the Semper Observatory
walk to Central; take the Polybahn from Central to the end of the line at Polyterrasse; walk via Tannenstrasse to the Semper observatory
walk from the main train station to Central; at Central go up the stairs to Hirschengraben, turn right; after about 150 m turn left and go up the stairs to ETH via Schienhutgasse; Künstlergasse; Karl Schmid-Strasse; at Rämistrasse turn left; after approx. 80 m turn right into Schmelzbergstrasse; the Semper observatory is 100 m up the hill on the left side of the street
exit the airport onto the freeway, follow the signs to Zürich (green sign), on the freeway, follow the signs to Zürich-City; at the Zürich-Ost junction take the Zürich-City exit; next take the first exit on the right for Schwamendingen / Irchel / Ueberlandstrasse / Universitätsspital (blue sign); always follow the Universitätsspital sign; at the Universitätsspital Notfallstation sign (red sign) turn left into Spöndlistrasse (just after the tram stop Haldenbach); at the intersection of Spöndlistrasse and Schmelzbergstrasse turn left; the entrance to the Semper Observatory's parking lot is on the left after approx., 20 m (at the Private No Parking sign)
freeway A1; at the Limmattalerkreuz junction follow St. Gallen / Zürich-Nordring signs; change to Zürich-City lane; at the Zürich-Nord junction take the Zürich-City exit; at the Zürich-Ost junction take the Zürich-City exit; next take the first exit on the right for Schwamendingen / Irchel / Ueberlandstrasse / Universitätsspital (blue sign); always follow the Universitätsspital sign; at the Universitätsspital Notfallstation sign (red sign) turn left into Spöndlistrasse (just after the tram stop Haldenbach); at the intersection of Spöndlistrasse and Schmelzbergstrasse turn left; the entrance to the Semper Observatory's parking lot is on the left after approx. 20 m (at the Private No Parking sign)
freeway Luzern-Zürich to Sihlbrugg; highway via Langnau a. A., Adliswil in the direction of Zurich; at Zurich follow TRANSIT / Zürich-Wiedikon / City; after the first light change lanes for Rapperswil / See / Enge; after the tunnel change to the left lane for Winterthur / Forch / Rüti / Rapperswil; at Bellevue follow the Winterthur / Universitätsspital sign; then follow the Universitätsspital signs; at the Universitätsspital Notfallstation sign (red sign) turn right into Schmelzbergstrasse (across from ETH main building); the entrance to the Semper Observatory's parking lot is on the left after approx. 100 m (at the Private No Parking sign)
freeway A1; at the Zürich-Ost junction take the Zürich-City exit; next take the first exit on the right for Schwamendingen / Irchel / Ueberlandstrasse / Universitätsspital (blue sign); always follow the Universitätsspital sign; at the Universitätsspital Notfallstation sign (red sign) turn left into Spöndlistrasse (just after the tram stop Haldenbach); at the intersection of Spöndlistrasse and Schmelzbergstrasse turn left; the entrance to the Semper Observatory's parking lot is on the left after approx 20 m (at the Private No Parking sign)
Freeway A3; follow right lane TRANSIT / Zürich-Wiedikon / City; after the first light change to Rapperswil / See / Enge lane; after the first light change lanes for Rapperswil / See / Enge; after the tunnel change to the left lane for Winterthur / Forch / Rüti / Rapperswil; at Bellevue follow the Winterthur / Universitätsspital sign; then follow the Universitätsspital signs; at the Universitätsspital Notfallstation sign (red sign) turn right into Schmelzbergstrasse (across from ETH main building); the entrance to the Semper Observatory's parking lot is on the left after approx. 100 m (at the Private No Parking sign)