Plaza Congreso with its enormous fountain called the Dos Congresos was renovated in 2007 as part of the city's refurbishment in anticipation of the 2010 Bicentennial Independence celebrations, with new paving and cleaning and restoration of the fountain and other monuments. The gate surrounding the fountain is usually locked, but ask the guard if you can enter. Near the fountain, on the southeast corner of the intersection of Callao with Rivadavia, is Argentina's National AIDS Monument, a tiny concrete stub with a red ribbon.
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Fundación Buenos Aires Sida