A 250-metre-long concrete basin, built in the Netherlands in 1977 to test defences against rising sea levels, is ripped apart and flooded to form this colossal artwork.
Dutch studios RAAAF and Atelier de Lyon transformed the disused Delta Flume at Waterloopbos to create the huge installation, billed as "a monument of the Dutch struggle against the water".

Called Deltawerk, the structure now stands a series of massive concrete slabs propped up against one another. These slabs are surrounded by water and many of them appear ready to topple at any moment.
The Delta Flume was one of numerous dams, sluices, locks and levees built along the coast of the Netherlands in the mid-20th century. It formed part of the Delta Works, which saw the nation trial different approaches to water management.
The aim of the hydrodynamic laboratory at Waterloopbos was to test how indestructible deltas could serve in the battle against flooding ? a technology that is seen as one of the country's greatest scientific achievements.
The long concrete basin served as a wave machine, allowing engineers to experiment with tsunami waves below sea level.

"The Waterloopbos was essentially a laboratory as large as an entire piece of landscape, where scale models and 1:1 tests could be carried out, informing the design and engineering of the Delta Works on the coast, as well as a few waterworks later on," explained Ronald Rietveld, co-founder of RAAAF.
"The Delta Flume remains th...