1. The Guemes Gallery (Galeria Güemes) is a historic building located in the heart of Buenos Aires, Argentina. Built in 1915, it was one of the tallest buildings in South America at the time, and is considered a prime example of the Art Nouveau style. The building is famous for its stunning central atrium, which is topped with a beautiful stained-glass dome and surrounded by balconies and columns. Today, the Guemes Gallery is a popular tourist attraction known for its shopping, restaurants, and stunning architecture.

2. The Guemes Gallery is open daily from 10am to 8pm. You can reach the gallery at +54 11 4816-2221.

3. There is no admission fee to enter the Guemes Gallery, and transportation is easily accessible via public transportation, including the subway and bus lines. The closest subway stop is the Carlos Pellegrini station on Line D.