Samarkand has a wealth of historical sites, such as Registan Square and the Ulugh Beg Observatory.
In Bukhara, you can visit the Palace of Khudayar Khan, Juma Mosque, and more.
The main attractions in Khiva are Itchan Kala and Dishan Kala, which have many ancient buildings and museums.
Kokand retains many historical relics and has good train services.