The Houtribsluizen locks form part of a waterway lock complex linking Amsterdam and Lemmer near Lelystad. The complex was opened in 1975. The Houtribdijk dike divides the IJsselmeer and Markermeer lakes. The Houtribsluizen complex consists of two locks and a drainage sluice, through which in excess of 80,000 vessels pass every year. The locks are operated 24 hours per day from a central operations tower. The drainage sluice has six openings which can be sealed off with steel flashboards. The total drainage capacity is maximum 630 m3 water per second.
A little way beyond the Houtribsluizen locks, at the Markerwaard dike, you will see the breakwater dam. After the long gentle curve to the right, take the 1st right hand turn towards the breakwater dam. You can park here (for free) and have a look at Exposure, the famous landscape sculpture.