Estonia recently dropped mandatory quarantine requirements for European Union Travelers. In addition, anyone with evidence proving they have recovered from COVID-19 in the past six months can enter Estonia.
This Eastern European nation has beautiful nature reserves, baroque palaces, and medieval spires. A family-friendly attraction is the AHHAA Science Centre located in Tartu.
One of the best places to stay is the V Spa Hotel Conference Centre located near the Estonian National Museum. More information is here.