Parco dei Gessi Bolognesi e Calanchi dell'Abbadessa
Just 15 kilometres south-east of Bologna's city centre, the Parco Regionale dei Gessi Bolognesi e Calanchi dell'Abbadessa is a geological wonderland of white gypsum outcrops, underground caves and dramatically eroded clay badlands (calanchi) that look more like the American Southwest than northern Italy. It is Bologna's great outdoors secret, beloved by hikers, cyclists and cavers.
The gypsum landscape
The park takes its name from the selenite gypsum (gessi) that outcrops across the Idice valley — a brilliantly white, crystalline rock formed from an ancient seabed. The Grotta della Spipola is the park's most spectacular cave system: over 5 kilometres of mapped passages with underground lakes, stalactites and rare cave-adapted fauna. Guided tours run on weekend afternoons from the nearby town of Croara.
Walking trail CAI 815 loops through the gypsum ridge above Croara, offering views across the Apennine foothills and, in spring, carpets of wild orchids on the rocky grassland. The contrast between white rock, green scrub and terracotta soil is visually striking.
The calanchi badlands
The Calanchi dell'Abbadessa near the village of Zena are the park's most photogenic feature: steep, ribbed clay gullies carved by erosion into an otherworldly moonscape of grey and ochre ridges. The calanchi are best visited in the soft light of late afternoon when the ridges cast long shadows and the colours deepen.
A circular trail of about 6 kilometres from Zena takes in the best of the badlands and the surrounding oak woodland, with minimal elevation gain. The route is well-marked and doable in 2–3 hours. Bring water — shade is limited in summer.
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