The top 10 countries with the most innovative architecture can vary based on personal opinions and changing trends. However, considering various factors such as architectural advancements, iconic structures, and design innovation, the following countries are often regarded as significant contributors to innovative architecture:

1. United States
2. Japan
3. United Kingdom
4. Spain
5. Germany
6. Netherlands
7. France
8. Denmark
9. China
10. Brazil

It is essential to note that architectural innovation can be found in many countries globally, and this list is not definitive.