IDM 2023 took us to the beautiful city of Barcelona for a long weekend of Lemoncelo, tapas and big drains. Here's a selection of the underground stuff.

A casual stroll around a huge tank:

Small gathering in a storm drain....

IDM 2023

Offical tour access to the sewers in the middle of the city, we did try but a worker was standing right next to it.

IDM 2023

Various low outfalls could be found along the River Besòs, overflows for a sewer that ran alongside.

One of the bigger tunnels which was another CSO, we could hear the main chamber but sadly needed waders to get past a flooded section. Kicked myself for bringing waders across Europe then leaving them at the hotel, next time.

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