Best countries and international markets to invest in to geographically diversify my portfolio?

Anyone here have ETFs that focus on specific countries or regions outside of the Unites States? I already have some broad ETFs that focus on the entire world outside of the Unites States and developing markets, but are there some specific countries or regions that look more promising in the years to come.

I am not exactly saying that international markets will outperform the United States, and most of my money is still in US stocks and ETFs, but this is more to just lower my risk than to outperform.