1. Casa Rosada
The pink presidential palace sits at the eastern end of Plaza de Mayo, facing the same square where Argentina declared its independence and where the Mothers of the Plaza de Mayo marched every Thursday for decades. The building at Balcarce 50 got its distinctive color sometime in the 1870s, and there are competing theories about why: one claims it was a political compromise blending the red of the Federalists with the white of the Unitarians. The more prosaic explanation involves bovine blood mixed into the original whitewash, a common practice at the time.
Inside, the Museo de la Casa de Gobierno displays objects from every Argentine president, from sashes to personal items to the actual balcony desk where Peron and Evita addressed crowds. The building was declared a National Historic Monument in 1942. Free guided tours run on weekends and cover the main halls, the presidential office, and the underground remains of the old customs house discovered during renovations.
The best view of Casa Rosada is from the middle of Plaza de Mayo in the late afternoon, when the sun turns the facade a deeper shade of pink. From here, Avenida de Mayo stretches west toward the Congress building, lined with grand cafes including the legendary Cafe Tortoni at number 825.