The Monterrei valley has been known for its mineral springs since Roman times. The waters at Cabreiroá and Sousas emerge naturally at around 15–18°C, rich in bicarbonate and calcium — mild enough to drink in volume, which is why both brands are bottled commercially. But the real experience is bathing. Several spa hotels in and around Verín offer thermal pool access, and a day between the castle, a wine tasting, and an afternoon at the baths makes a very complete visit.
The Cabreiroá spa facility is the most established, with both indoor and outdoor pools and a range of treatments. The Sousas springs are slightly less developed and a bit cheaper. In summer both get busy with Galician and Portuguese visitors who come specifically for the waters — book ahead if visiting in July or August.