Best 40th Birthday Travel Ideas: Where to Celebrate Your Milestone in Style Turning 40 is a big deal—it’s not just another birthday, it’s a milestone worth celebrating with a trip you’ll remember forever. I just celebrated mine a week ago. And prior to, I spent a lot of time racking my brain for awesome 40th birthday travel ideas. I knew I wanted to go to a bucket-list destination for this milestone birthday. Ultimately, I chose to go to Nashville with a group of my friends and some of our husbands. Whether you’re dreaming of a fun girls’ getaway, a trip with friends, or a relaxing escape with your partner, there…