Something nice for my parents!

Soo my husband and I sold our house and have been staying at my parents for nothing for the last 3 months.. Now we are moving into one of their rental homes for a large discount.. I really want to do something amazing for my parents as a thank you present. Can you guys give me some ideas???? I'm thinking beach getaway.. Spa day? Something really spectacular. Looking to spend no more than 1000. Thank you !!!!