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Y-40 The Deep Joy
 Via Cataio, 42, Montegrotto Terme, PD 35036, Italy
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Max Depth: 131-140ft/40-43m
Average Viz: Over 150ft/46m
Entry Type: Shore
Bottom Composition: Rock
Aquatic Life: None
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Rating: 5.00 by 1 divers
Spring: Over 85°F/29°C
Summer: Over 85°F/29°C
Fall: Over 85°F/29°C
Winter: Over 85°F/29°C
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Y-40 The Deep Joy is a shore accessible fresh water dive site, located at Via Cataio, 42, Montegrotto Terme, PD 35036, Italy. This dive site has an average rating of 5.00 out of 5 from 1 scuba divers. The maximum depth is 131-140ft/40-43m. The average visibility is over 150ft/46m. This dive site provides bathrooms and airfills. Training platforms are available.
Y‑40 is a geothermally heated dive pool in Montegrotto Terme (near Padua, Italy), reaching a maximum depth of 42.15 m — over 130 ft — and holding around 4.3 million liters of warm (32–34°C) thermal water.
It features multilevel platforms, artificial caves, and a 13 m transparent underwater tunnel for viewing dives, making it ideal for freediving, scuba training, research, and even film/video productions.
Since opening on 5 June 2014, it set a Guinness World Record and remains the world’s deepest geothermally heated pool, attracting divers, freediving champions, artists, and researchers year-round.