Destruction of the Kakhovka Dam
The Kakhovka Dam was breached in the early hours of 6 June 2023, causing extensive flooding along the lower Dnieper river, also called the Dnipro, in Kherson Oblast. The dam was under the control of the Russian military, which had seized it in the early days of the Russian invasion of Ukraine.
Source: Wikipedia — Destruction of the Kakhovka Dam (CC BY-SA 4.0)