The original structure was built in 1931 by the Northern Electricity Companies, as a holiday colony for the children of its employees. Its use remained unchanged until 1998, when it was taken over by a company composed of true lovers of hospitality and food and wine, in love with the Tuscan land.
The recovery plan initially envisaged the transformation into luxury apartments, but following the first project and accurate market surveys, the property decided to lean towards a type of investment that would bring a greater benefit to the Municipality of Castagneto Carducci and to the whole area.
The massive renovation of the colony began in October 2000 and commits means, labor and materials from all over Italy and abroad. Two years later, when the works were completed, the Tombolo Talasso Resort is a unique complex in Italy in terms of size, state-of-the-art facilities and refinement, which takes its name from the characteristic tomboli, sand dunes covered with Mediterranean vegetation, typical of the coasts of the lower Tuscany. Since April 2017 Tombolo Talasso Resort has joined the Cosmopolitan Hotels Group, a Tuscan hotel group, which in recent years has expanded its presence in the tourism industry, based on a concept of excellent hospitality, in unique and exclusive contexts.