
Montecatini Terme is, perhaps, the most famous among all spa towns in Italy. Its historical and natural importance, as well as fame, are such that it became part of the UNESCO World Heritage as one of Europe’s great spa towns.
Italy’s spa town Montecatini Terme had worked nearly nonstop for seven years in its campaign to achieve the status of a UNESCO World Heritage site.
Source: Italian spa town Montecatini Terme basking in its UNESCO honor while looking to future

Unesco designated 11 picturesque towns built around natural mineral springs as a single World Heritage site. Their influence on architecture and landscape design continues to this day.
Source: A Cross-Continental Recognition for the Spa Towns of Europe