Aesculus hippocastanum (Poland)

Aesculus hippocastanum L.,  Sp. Pl. 344 1753. (syn: Aesculus asplenifolia Hort. ex Loud.; Aesculus castanea Gilib.; Aesculus heterophylla Hort.; Aesculus incisa Hort.; Aesculus memmingeri Hort. ex C. Koch; Aesculus procera Salisb.; Aesculus septenata Stokes; Hippocastanum aesculus Cav.; Hippocastanum vulgare Gaertn.; Pawia hippocastanum (L.) Kuntze);

Central Balkan Peninsula to Turkey as per POWO;

Albania, Bulgaria, Greece, Macedonia, Kosovo, Montenegro, Slovenia (I), Croatia (I), Bosnia & Hercegovina (I), Austria (I), England (I), Czech Republic (I), Slovakia (I), France (I), Germany (I), Ireland (I), Switzerland (I), Spain (I), European Russia (I), Northern Caucasus (I), Transcaucasus (I), Belarus (I), Kazakhstan (I), Uzbekistan (I), Turkmenistan (I), China (I), USA (I) (Connecticut (I), Georgia (I), Iowa (I), Illinois (I), Indiana (I), Massachusetts (I), Maryland (I), Maine (I), Michigan (I), Minnesota (I), North Carolina (I), New Jersey (I), New York (I), Ohio (I), Oregon (I), Pennsylvania (I), Rhode Island (I), South Carolina (I), Virginia (I), West Virginia (I)), Canada (I) (British Columbia (I), New Brunswick (I), Ontario (I), Quebec (I)) as per Catalogue of Life;
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Spiny fruits it is Aesculus hippocastanum

Aesculus hippocastanum L.

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References: POWO  Catalogue of Life  The Plant List Ver.1.1  Wikipedia  Wikimedia Commons
https://canr.udel.edu/udbg/?plant=aesculus-hippocastanum