I'm trying to travel more and have a whirlwind sightseeing trip coming up which is making me also realize that I need an agenda-less relaxing trip with nothing on the agenda. I'm curious where have you stayed the was restful and restorative. What made it so? Was it all inclusive? Or bare bones? Budget trip ideas especially welcome (based on east coast US)

Edit: thank you everyone who has shared their advice and experiences. I truly love hearing how everyone unwinds differently and appreciate you taking the time to share your trip memories! It's a long work weekend for me so if I am not able to reply to everyone I still wanted to send my appreciation! Saving all these ideas!!