Hello,
To see the number of caches in the different regions of Czech Republic you need to perform the following steps:
1) Click on Statistics (header menu, on the top of the project-gc site) to open the menu
2) In the part "Cache Stats", click on "Caches per area" to open the "Caches per area" page
3) In the first drop down list next to "Cache location", chose "Czech Republic"
4) Click on "Filter" to display the graph of the number of cache per region in Czech Republic