see + do
Concierge.com's insider take:
Accessible from calles Viamonte or Brasil, on the riverward side of Puerto Madero, the expansive Costanera Sur ecological reserve—built over a landfill—feels worlds away from the urban hubbub of Buenos Aires. A sprawling expanse of wetlands filled with foxtail pampas grass, the reserve is the kind of place where you're likely to encounter some of its 200 bird species and a handful of lizards sharing their habitat with joggers, bikers, and picnicking weekenders. The monthly "Walking Under the Full Moon" tours are a special treat.
Open Tuesdays through Sundays 8 am to 6 pm (April through October), Tuesdays through Sundays 8 am to 7 pm (November through March).