The Buenos Aires skyline is relatively young and yet incomplete. The best view is either directly from the Río de la Plata or from the Costanera Sur Ecological Reserve as in this case. This huge peaceful morsel of nature was formed by landfill from demolished buildings during the 1970s. Since then it developed itself into a biodiversity hotspot. It's ornithologist's paradise and an important bird area. Sadly, the biggest threat to this park is the skyline itself that comes ever so close. Let's hope the property sharks will keep their greedy hands off the nature reserve.