The Best Castles and Palaces to Visit in the United Kingdom The UK is known for some of the best castles and palaces in the world. I think every little girl’s dream is to become a princess. Yes, I’m one of them. I’m fascinated to learn about and visit castles and palaces in the UK. Since I moved to the UK back in 2009, castles and palaces are always on my list every time my husband and I go travelling around the country for a short break.