Reservoirs of the Plaine Saint-Denis (here, the smallest tank), located under the France stadium are one of the largest type of construction. It can hold up to 165.000m ³ of water. The irregular shape of the pillars is due to the construction technique by molding (digging the soil, concrete injection and clearing the land around the pillar).

An abandoned water park on the island of Villennes sur Seine. The river water was filtered before being put into the pool of 2000 sqm. I have some memories of site activity.

The undergrounds beneath Fourviere were designed to avoid landslides by draining water.

The reservoir of Saint-Denis has two goals. Fight against flooding by optimizing draining and treat the pollution by settling the water.

Sometimes, the quarry collapse inside the walls! It is caused by the gypsum and the water.

The EDF tower of Cergy Pontoise was built in 1974 by the architects Renzo Moro and Guy Lagneau. It is the tallest building in the Val d'Oise. It is 86m high and 14 floors. From innovative design, is one of the first buildings in France to have a structure irrigated. The building is constructed with water-filled tubes which protects it in case of fire.

source: Wikipedia

The water slides in a water park abandoned.