Trip Ideas with One Parent

For those of you who take trips with just you and your kiddo, where you get on a plane and stay at a hotel, what types of trips are y'all doing?

My kiddo and I have taken a few trips the last year to visit friends or our old hometown. Usually a 2 night trip, which is about all I can handle (not cut out to be a SAHP, I just don't have the stamina).

The flights are usually less than 2 hrs, and we spend maybe 25% of the time visiting friends, but the rest of the time just lounging, exploring the hotel, eating at a restaurant, and swimming at a pool. There's usually a purpose for each trip (work, someone's wedding), but I thought it might be fun to plan something just as a mini vacation for the two of us.

I don't want to do anything big like an amusement park because I can't handle that without another adult (chaos and oversimulation for me). But something more than visiting my works HQ.

At this age, what types of trips are you doing with just you and your kiddo? Where are you going and what are you doing there?