The Observatory by Robert Morris consists of two concentric earthen walls. In these circles, there are three V-shaped cutouts that provide views of the polder landscape. Through the central steel sight, the sunrise can be observed at the beginning of spring and autumn, when day and night are of equal length. The stone wedges on either side show the sunrise on June 21 and December 21.
This is the first Land Art piece in Flevoland. Robert Morris's Observatory was originally created near Velsen as part of the large exhibition *Sonsbeek Buiten de Perken* (1971), but it had to make way for new construction. In collaboration with the Stedelijk Museum Amsterdam, it was decided to rebuild it near Lelystad, in what was then a vast, empty landscape. The artwork references prehistoric sites where the sun and planets were observed, such as Stonehenge in England.