most (not all, some contributions are QTVR-only due to historical reasons)
Javascript + HTML5 / WebGL
many, but depends on photographer's choice of file upload (newer event = more likely to work) and your device's capabilities. You may experience slow playback, distorted images or unexpected browser quitting if there is only limited memory/GPU power available.
(EN) The Chernaya (literally "black") River is one of the 9 major tributaries of the Izhora River. It's calculated length is 23 kilometers. The Chernaya river runs through the forest that gives the water a dark shade. Riverbanks overgrown by bird cherry.
(RU) Река Чёрная - один из 9 главных притоков реки Ижоры. Её длина - 23 километра. Река Чёрная бежит через лес, который придаёт воде темный оттенок. Берега реки заросли черёмухой.
Geographic Coordinates:
Latitude: 59° 37' 12" N
Longitude: 30° 29' 16.8" E
Precision is: Medium. Nearby, but not to the last decimal.