Ykuá Bolaños, el manantial de fray Luis de Bolaños

Ykuá Bolaños ("Bolaños's well") is a spring near downtown Caazapá, surrounded by trees that protect its catchment. The legend says it burst from a rock when the priest Luis de Bolaños struck it as proof of God's existence before sceptical indigenous people. Bolaños was the Franciscan friar who founded Caazapá on 10 January 1607 under the name San José de Tebicuary; over the years it became the most important Franciscan reduction in the governorate of the Río de la Plata. The site is dear to locals: in 2010 hundreds of people protested against a subdivision project on an adjoining lot because they feared the works would dry up the spring. It is a calm stop of shade and water on the Franciscan route.

Fray Luis de Bolaños founded the Franciscan reduction of Caazapá in 1607, during Hernandarias's second term as governor. The spring, tied to his figure, is a landmark of local memory.