Russia stretches across 11 time zones from Moscow's Red Square to Lake Baikal's deepest lake on Earth and the volcanic Kamchatka peninsula, with Saint Petersburg's white nights peak in mid-summer.
Saint Petersburg White Nights with light past midnight, Moscow parks blooming, and the Trans-Siberian railway running its full schedule with reasonable temperatures.
Moscow hits 28°C, Lake Baikal warm enough for swimming briefly, and Kamchatka's volcanic hiking season at peak with bears salmon-fishing.
Golden Ring autumn through Suzdal and Vladimir, Moscow Garden Ring chestnut leaves turning, and the Hermitage and Peterhof at their most pleasant.
Cold winter with Moscow at -10°C, Lake Baikal frozen and ice-walkable, and Trans-Siberian running its winter schedule with snow on the Siberian steppe.