The Maps tab is a tab in a users Profile Stats that shows where they have found caches. At the top there is a World map that shows how many of the 250 countries the user have found caches in, under the world map all the found countries are listed with the number of caches found in each country.
Next is a map of the country where the user have found the most caches followed by maps for the continents where the user have found caches and after that a map for each country that the user have found a cache in. This tab will be very long if the user have logged many countrys.
The maps of individual countrys have toggle buttons for regions and counties, there is also buttons for each individual region that the user have found caches in, clicking the button with the regionname produces a map of the region with the found counties marked.