CORDEX slide, the Caucasus region was criss-crossed by various bounding boxes. Which one is the best for Caucasus? Is there Caucasus covered in high resolution models?

That is a very good question to ask. The answer is somehow more complicate as there is no single best model or domain. It somehow depends on what do you want to use it for but as a rule of thumb I would tend to choose a domain which has the area you are interested in well at the centre. I don’t think there is a caucasus domain for CORDEX. On both questions @Erika and @Erik may have a better and more informed answer.