There are quite a bit of places in EU with low capital gains tax and can be gorgeous to live in if you're wealthy. For example Croatia is a EU member - capital gains tax is flat 12%, and is a popular tourist destination with beautiful coast. It's not a bad deal if you're a remote freelancer - you end up paying like 20% in taxes total + something like 300€/month flat for health insurance and minimal pension contributions.

Monaco is the place if you're super rich.