The Odesa Catacombs, amid Russia's invasion of Ukraine

People walk inside the catacombs, amid Russia's invasion of Ukraine, in Odesa, Ukraine 10 July 2022. The Odesa's catacombs are a labyrinth-like network of tunnels and subterranean cavities located under the city and its outskirts. It is one of the world's largest urban labyrinths, running up to 2,500 kilometres, parts were used as air-raid shelters during the Second World War. Currently some locals using the catacombs as a bomb shelter during air raid alert, amid Russian invasion in Ukraine.