Aesculus hippocastanum (Horse Chestnut) flowers.

Aesculus hippocastanum is native to a small area in the Pindus Mountains mixed forests and Balkan mixed forests of South East Europe. However, it can be found in many parts of Europe as far north as Gästrikland in Sweden as well as in many parks and cities in the United States and Canada. It is widely cultivated in streets and parks throughout the temperate world and has been particularly successful in places like Ireland, Great Britain and New Zealand where they are commonly found in parks, streets and avenues. Cultivation for its spectacular spring flowers is successful in a wide range of temperate climatic conditions provided summers are not too hot, with trees being grown as far north as Edmonton, Alberta, Canada, the Faroe Islands, Reykjavík, Iceland and Harstad, Norway.
(Wikipedia).

Camera: Nikon D500
Lens: AF-S DX Zoom-Nikkor 17-55mm f/2.8G IF-ED
Software: Nikon Capture NX2