On this Travel Tuesday we take a look at how certain European cities that are popular to tourists have started becoming vocal about how they would rather those tourists not visit.

Countries such as Spain, Italy, Prague and Croatia have been inundated with a lot of tourism for a long time now, and although the concerns differ, the sentiment is the same: "Please visit somewhere else".

Here are some examples of how certain cities are looking to tackle the issue of tourism:

Barcelona: The city saw more than 8 million tourists in 2016. Angry protests have prompted the city to limit future hotel construction and cap private home rentals.

Venice: There is "extreme concern" over the impact of tourism on historical sites in Venice. Authorities plan to limit the number of new hotel rooms and launched a new campaign instructing tourists on how to behave: no littering, don't leave "love locks," no swimsuits in town, and no picnics on the steps of the city's architectural masterpieces.

Croatia: In the town of Dubrovnik, the number of visitors has increased by 10 percent since last year, as people flock to see the hit TV show Game of Thrones' filming locations. Security cameras have been installed to control the flow of tourists. They also want to place a limit on the number of cruise ships.

Prague: While there have been no protests there, the city is asking for quiet, please. In May, the city hired a special "anti-conflict team," which patrols the busiest areas at night, asking tourists to respect the official "night quiet time," which starts at 10 p.m.