Plaza Mayor

This square, located in the heart of Madrid, is more a must-experience attraction than a must-see one. Ringed with cafés and bars, the Plaza Mayor practically begs passersby to take a seat, order a coffee or glass of wine (depending on the time of day) and people-watch. The square starts getting busy about 2 p.m. and will grow increasingly busy as night falls.

Recent travelers acknowledge the touristy nature of Plaza Mayor -- the souvenir shops, the less-than-gourmet yet overpriced restaurants -- but many of them still take the time to sip a cortado and take a few pictures.