Under the A4

Long walk following the river north towards The Hague. Some 4km from Delft, as I passed under the A4 I noticed the mural on the pillar. Back in the house I did some research: it's one in a collection of 15 pieces in an open-air art exhibition about the history of goods transportation by water. It's been there since 2015, at different locations up and down the Schie river. Now I'll have to check the rest.