For Uzbekistan, the good news is visitors from 65 countries now enjoy visa-free entry for up to 30 days, including most Europeans, Canadians, Australians, and many other nationalities.
Visitors from 77 countries not on the visa-free list, including Americans between 17-55 years old,* can apply online for an Uzbekistan tourist e-visa for stays up to 30 days. It takes around three days and costs $20 for a single entry, $35 for double entry and $50 for multiple entry. Be sure to print out your e-visa to show when boarding flights to Uzbekistan and at border control.
*Uzbekistan allows visa-free entry up to 30 days for U.S. Citizens over 55. You can find more information about this at the Uzbekistan Embassy website.