Leidseplein and Nieuwmarkt Squares Amsterdam Leidseplein is considered the busiest square in Amsterdam, with street artists, puppet shows, magicians, musicians and contortionists. There are many open-air bars and cafes in the square during the summer months where you can enjoy a refreshing drink and watch the world go by. There are also many theatres and cinemas in the square. Nieuwmarkt is another busy square in the city with an open-air market and various open-air cafes. The square is also a great spot to find restaurants and cafes. Amsterdam Guide | Monuments in Amsterdam Leave a Reply Cancel Reply Your email address will not be published.CommentName* Email* Website Save my name, email, and website in this browser for the next time I comment.