High above Ulassai, the mammoth Grotta di Su Marmuri is a 35m-high cave complex. Visits are by guided tour only (minimum of four people), which take you on a one-hour, 1km walk through an underground wonderland festooned with stalactites and stalagmites – some like humongous drip candles, others as delicate as coral. Whatever the temperature outside, it is always chilly down here, so be sure to bring some extra layers.
Grotta di Su Marmuri
Top choice in Eastern Sardinia
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