On the second day of their trip, the group visited several important landmarks in Buenos Aires including the Congreso, Casa Rosada, Teatro Colon, Plaza de Mayo, Catedral, and Recoleta. They started their day with breakfast before taking a bus to Plaza de Mayo. Upon arriving, they realized many sites were closer than expected. The document then provides brief descriptions of each landmark visited, including details about the Congreso building, Plaza de Mayo's role in Argentina's independence, the pink color and presidential museum of the Casa Rosada, Teatro Colon being one of the top 5 concert venues, the metropolitan cathedral overlooking Plaza de Mayo, and Recoleta being known for its cemetery.