Effetto Blu – The Festival of the Lock and Bologna's Canals

Effetto Blu, the Water Festival in Casalecchio di Reno

There is a place, on the outskirts of Bologna, where water has been writing history for almost a thousand years: the Casalecchio Lock. Every year, on a late May day, the Consorzio Canali di Bologna opens it to the public with Effetto Blu – The Festival of the Lock and Bologna's Canals, a widespread event that invites citizens and visitors to rediscover the hydraulic and historical heritage of the area through Renaissance walkways, river landscapes, and extraordinary engineering works.

The Lock, a European First

The Casalecchio Lock is the oldest hydraulic work still in operation in Europe: for centuries, it has diverted the waters of the Reno River towards the Reno Canal, which feeds Bologna's canal network. Due to its historical and civil value, it has been recognized by UNESCO as a "messenger heritage of a culture of peace". Effetto Blu was created precisely to tell the story of this normally little-seen heritage and to open spaces and walkways that are inaccessible during the rest of the year.

A Widespread Day between Casalecchio and Bologna

The event takes place in multiple locations, from the heart of the Lock to the sluice gates that regulate water flow towards the center of Bologna. Among the main venues in recent editions: the Casalecchio Lock at Via Porrettana 187, the Casa delle Acque (House of Waters), the Casa dei Ghiacci (House of Ice), and the Paraporto Scaletta (Scaletta Sluice Gate). The common thread is always water, explored through cultural, environmental, educational, and convivial aspects.

What to do at Effetto Blu

• Guided tours of the Lock and sluice gates with specialized guides, to discover the workings of the hydraulic system up close;
• Creative workshops and shows for families, designed for children;
• Themed bike tours along the canals and discovery routes of the area;
• Live music, DJ sets, and sunset aperitifs with local wineries;
• Tastings and street food with typical Bolognese products;
• the evocative Water Lily Ceremony, the day's concluding moment where wishes are entrusted to the water on biodegradable water lilies.

An Event for Casalecchio and Emilia-Romagna

Effetto Blu is part of the Bologna Estate program and is one of the most distinctive events of the Municipality of Casalecchio di Reno, in the Metropolitan City of Bologna. For the public of Emilia-Romagna and for tourists, it is the perfect opportunity to combine nature, history, and gastronomy in a single day, just a few minutes from the center of Bologna but immersed in the landscape of the Reno River.