Astana is the strangest capital you can visit without leaving the steppe. In 1830 it was a Cossack outpost called Akmolinsk. Later it became a grain town renamed Tselinograd during the Soviet Virgin Lands campaign, and in December 1997 Kazakhstan moved its capital here from Almaty. Since then a Japanese master plan, a lot of oil money and architects like Norman Foster have turned a windswept town into a city of gold spheres, glass pyramids and a transparent tent. The name has changed again too: Astana became Nur-Sultan in 2019 and went back to Astana in September 2022.
It's a city to see on purpose, not by accident. The new government district on the left bank is huge, theatrical and built for photographs, and the old town across the Ishim river is smaller, plainer and more lived in. Three days is the right length: the big sights lie along one long axis, you want warm museums between the cold walks, and there isn't a fourth day of must-sees. Be honest about the season. January averages about -14.5°C according to Kazhydromet, the national weather service, and the wind rarely stops. A winter visit works if most of each day is indoors.
Day one covers Khan Shatyr, Baiterek and Nurzhol Boulevard, day two the Palace of Peace, Hazrat Sultan mosque, the National Museum and the Expo site, and day three the old right bank, the river and the opera. In summer, add a night at Burabay. Astana is the easiest start to Kazakhstan, and it pairs with 5 days in Almaty, the former capital in the south. Start on a Tuesday, Wednesday or Thursday, so the National Museum, closed on Mondays, is open on day two.