Vallone dei Mulini, also known as Valley of the Mills, is a historic valley located behind Piazza Tasso in Sorrento, Italy. The valley gets its name from the flour mills that were built there as far back as the 13th century to grind grain. Over time, a sawmill was also established to provide sawn wood.

However, the mills became isolated in 1866 when Piazza Tasso was established. The mills and surrounding area were eventually abandoned in the 1940s.

The valley was carved out by two rivers and has very high humidity due to its geography. It is considered an enchanting view and known for its variety of unique and rare plants that have adapted to the moist conditions within the shaded valley.

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