Sterlingtown has a good burger and mushroom appetizer. It’s kinda pricey for what it is though. Not many options for non meat eaters- yes they have a rice bowl, but $18 for a bowl of rice and veggies and then to pay extra for tofu? Sorry.

Appleton has a new restaurant called Fōda which I have not been to yet, but have heard generally good things about.

Sweetgrass Distillery has a good low cost tasting thing you can do. I think it’s like $5. It’s fun if you like booze. They have a bunch of cordials as well, so the tasting is interesting.

You will be close to Rockland/Camden and all they have to offer. Also the Washington Store in, well, Washington has really good food.

The town clubhouse is the Pour Farm though, open Thursday-Sunday. Good beer, the staff is very friendly and the setting is beautiful. They have fire pits out back and wood, ask at the bar and they will give you paper and a lighter to start a fire. Great place to chat with locals.

As others mentioned, look up the George’s River land trust hiking network. Lots of trails very nearby Union in Hope, Warren, Waldoboro, etc.

If you want a very very basic breakfast out, Come Spring Cafe is in Union. Cash only. Moodys Diner in Waldoboro is better.

Edit: You are also striking distance (~35 minutes or so) from Belfast. You can take a very scenic drive on Route 131 through Appleton past a few ponds, go through Searsmont which has Thresher's Brewery which has live music and a full kitchen now, and then turn on Route 3 at Belmont Corner and go into Belfast that has a bunch of things do see/do. Nice little shops to check out, some good restos, Marshall Wharf brewing which is excellent, Young's Lobster Pound which is open year round if you want a lobster roll and are prepared to pay a premium for a January lobster roll. Also, the gas station on Rte 17 has a surprisingly decent prime rib takeout dinner for $20 on Friday and Saturday nights. I know, gas station prime rib, but I got it a couple months ago and it was good.