[1][2] Yerbal Viejo, the first settlement, changed its name in memory of the famous Guarani chief "Oberá" (the one who shines).

To the north, the highest point is in the so-called Cerros Chapá, reaching 401 meters above sea level, where the Sierra de Misiones begins.

The altitude decreases towards the Uruguay River; for example, the town of Panambí (which means butterfly in Guarani) is at 90 meters above sea level.

For example, the Yabebiry stream (which originates near the city of Oberá) and the sub-tributaries on its right bank: the Grande, Soberbio, and Chapá streams; among the sub-tributaries on the left bank is the Salto stream, which, 10 km from the city of Oberá, forms an attractive waterfall on Mr. Berrondo's fields, hence the name Salto Berrondo, which offers tourist services and infrastructure to visitors.

Due to this characteristic, the city of Oberá was declared the National Immigrant Capital, and every September, the traditional National Immigrant Festival is celebrated, where communities showcase their ancestral customs through social practices, clothing, music, dance, food, and typical drinks.