Just 35 kilometres from Barcelona, in the Vallés region, lies the town of Caldes de Montbui and the town that bears the same name. As you can guess from its name, the reason that this town has become an important tourism centre is the fact that it has many spas with hot springs.
The thermal waters that emerge from the deep gorges of the earth and flow into its streets at a temperature of over 70 degrees Celsius were discovered during the Roman Empire times. It was the Romans who built the famous Roman baths in the 1st century and these baths still remain to this day. They are considered to be the best preserved spas of the peninsula.