Mercedes (Corrientes)Corrientes in Argentina. It's a pretty nondescript town that strictly sticks to siesta. However, to visit Esteros del Ibera and Colonia Carlos Pellegrini it's the place to get a transport and also organise your stay and activities in Carlos Pellegrini though not necessary.
The options to get in are few. There are direct buses from Parana in the South, Corrientes in the North and Paso de los Libres (on the Buenos Aires - Puerto Iguazu line).
phone: +54 11 5272 0343address: Casilla 45It offers rooms fully equipped with living room, private toilet and bath, and unique decorations such as ancient maps and raw wildlife prints. Some of its amenities are DVD and video library, laundry service, and WiFi.
phone: +54 3773 423167address: Dr. Rivas 688, Mercedes, CorrientesIt's a place to sleep but nothing to write home about. No English spoken.
One Bus Monday to Saturday to Colonia Carlos Pellegrini at around noon. 25 Pesos and about 3 hours on a dirt road. Book in advance at the hostel or the terminal.