Ayolas is a city in the department of Misiones, Paraguay, located at 310 km southeast of Asunción, on the banks of the Paraná River. It is, also, the name of the district within which the city is located. Toponymy The city takes its name on behalf of Juan de Ayolas, second of Pedro de Mendoza, who founded Puerto la Candelaria, now Fuerte Olimpo, on the Paraguay River. He is believed to have been killed by Chaco Indians, because he disappeared and never was heard of again. Before being called Ayolas, it was known as "Paraje San Josemí", in accordance with the foundation decree that established that Ayolas should be founded in Coratei, but because the founders found that Coratei was a desolate place, they decided to found Ayolas in Paraje San Jose mi, which was a Jesuit port, and had a certain amount of population, had a church, plaza and had more status than that of Coratei for that reason Ayolas was founded in San Jose Mi and not in Coratei. Geography Ayolas is located on the south of the country, near the towns of Santiago, San Juan Bautista and San Ignacio, opposite Ituzaingó, Argentina. It is on the north bank of the Paraná River, at the border with Argentina, and is close to the Yacyretá Dam. It was a simple fishing village, which has been completely transformed with the construction of the Yacyretá Hydroelectric, with modern infrastructures, which make it the most modern city in the department of Misiones. Corateí beach, with its white sands, is very visited by tourists, in summer, water sports are practiced there. In summer, the maximum temperature is 41 °C, the minimum in winter is generally 0 °C. The annual average is 21 °C. In terms of seismicity, the region responds to the "Paraná River" and "Uruguay River" sub-faults, with low seismicity. Its last expression occurred with the Ituzaingó tremor of 2009, with 3.5.3 The Civil Defense must warn about listening and obeying about severe, infrequent storms, and low seismicity, with seismic silence of 12 years due to the "Paraná River sub-fault" and the "Uruguay River" 18 km from the Permanent Villa of Ayolas, there is an area of 100 ha, where various animal species are housed in conditions of survival and reproduction, in the Atinguy Refuge. This refuge has been maintained by the Yacyretá Binational Entity since 1982. Guided tours are made along