Kameoka Fog Terrace かめおか霧のテラス
Check the municipality's webcam first: without fog, at dawn, there is nothing.
A viewing terrace near the summit of Mount Ryūgao, above the Kameoka basin, built for watching the tanba-giri, the fog that fills the valley floor from autumn to spring and that the municipality states is visible above all at dawn. Because the fog is either there or not, the tourist association keeps a webcam pointed at the terrace, and a second one at Senju-ji on Mount Tokkonage, about 4.5 kilometres away.
Kyoto
https://theanimetrip.com/luoghi/terrazza-della-nebbia-di-kameoka