From the E34: towards Bruges/Maldegem, exit Ringlaan R43 (Eeklo). Turn right Zeelaan N9 (towards Maldegem), then to Prins Boudewijnlaan, 4.4 km slight bend to the left the Malecote, after 950 m turn left to Oosteindeke, after 25 m turn right onto Staalijzer. Keep right for Staalijzer, you'll reach Heulendonk 21.
From April to September:
Wed - Sun: 10 am to 6 pm
From October to March:
Wed - Thurs: 12 noon to 6 pm.
Closed on Mondays and Tuesdays.