Reserva Ecológica Costanera Sur

"Just adjacent to the newest and most expensive neighborhood in Buenos Aires is an 865-acre ecological park. The Costanera Sur reserve is one of the few spots in the city that really embraces the beauty of Río de la Plata, the massive river that hugs Buenos Aires’ coastline. It’s also one of the last remaining green spaces rich with the area’s native flora and fauna, and the single best option for bird watching inside city limits.The reserve has several trails and cycling paths that offer panoramic views of the city landscape, with skyscrapers in the background and native plants in the forefront. It’s also a good spot for a quiet picnic, and an escape from the noise of the city. The ecological park is open every day except Mondays, with free entrance and tours you can book in advance (call ahead to schedule a tour in English). We recommend taking a tour at night on the Friday closest to a full moon." - MATADOR_NETWORK

"The Costanera Sur Ecological Reserve owes its creation to rubble from a highway construction project that was dumped into the river: As nature took over the landfill, new life emerged along the shoreline. Look out over the estuary—that spot on the horizon (on clear days, at least) is Uruguay. Glance back toward the city and admire the urban-rustic juxtaposition of cattails framing sleek steel towers. You could spend all day walking the trails here, so give yourself at least an hour; rent a bike at the main entrance to get around faster. There are free guided tours in Spanish on weekends, plus monthly bird-watching excursions and full-moon nighttime walks. By Travesías"

"The Costanera Sur Ecological Reserve owes its creation to rubble from a highway construction project that was dumped into the river: As nature took over the landfill, new life emerged along the shoreline. Look out over the estuary—that spot on the horizon (on clear days, at least) is Uruguay. Glance back toward the city and admire the urban-rustic juxtaposition of cattails framing sleek steel towers. You could spend all day walking the trails here, so give yourself at least an hour; rent a bike at the main entrance to get around faster. There are free guided tours in Spanish on weekends, plus monthly bird-watching excursions and full-moon nighttime walks. By Travesías"