This is definitely a non-exhaustive list - for example a lot of initial Soviet Uranium stock was mined in the Czech Republic (then Czechoslovakia) and contributed to it being forced to the Soviet sphere of influence.
While most of the mines are no longer active I'm sure there are still reserves that could be mined by modern methods (ideally without political prisoners doing the mining this time) and I'm sure there are more places like this.
Some references: https://www.osti.gov/etdeweb/servlets/purl/20224726 https://www.suro.cz/cz/vyzkum/vysledky/strategie-rizeni-napr...
While most of the mines are no longer active I'm sure there are still reserves that could be mined by modern methods (ideally without political prisoners doing the mining this time) and I'm sure there are more places like this.