Here's a town square with a statue of General José de San Martín, who led Peru, Argentina, and Chile to victory from Spain, plus some cool colonial architecture around.
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Another regional museum, this one with perhaps more of a natural history and archeology focus to it.
History museum of the region.
Neoclassical cathedral with two towers overlooking Plaza Pringles (with a statue of a colonel by that name - no chips, sorry).
Large urban park with riverfront access, open spaces and a large waterfall.
El Hito
An impressive observatory of the surrounding area along Hwy 7 demarked by pyramids with observation platforms at top.
A conspicuous hill offering views of area if you want to put a good hike in.