Ayolas is a city in the department of Misiones, Paraguay, located at 310 km southeast of Asunción, on the banks of the Paraná River.

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.

The native animals of the area of influence of the dam are protected in order to disseminate and develop captive breeding programs for species with conservation problems.

The city of Ayolas was founded in 1840 by Patricio Aquino, on a request made by José Gaspar Rodríguez de Francia.

When the dam was being built, the city was projected from scratch right next to the original town settlement (also known as "el pueblo" locally) so that the workforce could be properly lodged.

Near the town is the hydroelectric dam of Yacyretá, "country of the moon" due to its location near an island which coexists with unique ecosystems in Paraguay.

In Ayolas, there is an arqueologycal museum with objects found in the zone, such as urns for the Indians of the region, as well as many animal and vegetables species.

The town of Ayolas is a total enjoyment for the fishermen, for the characteristics of the zone and the extraordinary fishes, such as boga, dorado and other species.

In September they celebrate the Arary Festival, which takes place at the Theatre of the Mil Viviendas, and many Paraguayan and Argentinian artists play.