Oihane's apartment is really centrally placed, with all the amenities around it. Madrid is one of the most compact cities and the apartment is just within its boundaries. Once there, a 10euro taxi trip from Atocha, everything is walkable and minutes away. The area is surrounded by bars and restaurants with all the advantages and disadvantages that may give. Stay out late on a Saturday night and get up early on the Sunday morning, you won't have much choice but both a recommended. The Sunday Market is great and needs a good four hours to walk around. Leave your cash at home, not because it is unsafe, more likely you'll spend it all.