Algar do Carvoa is a laval tube in the center of Terceira island in the Azores. Postcard is mailed from Guarda, Portugal. Thanks to Norta.
My worldwide collection of postcards written stamped and mailed to me from the country of origin. Trying to get 20 postcards sent from every country. Thank you. Xie xie. Merci. Gracias. Terima kasih.