Here is the full list of all 19 Haven Park achievements.
Finish all the quests
Jump on a swing
Light 5 firefly lanterns
Find and fly with the hot air balloon!
Spend a week in the park
Play the guitar
Swim to the north-most part of the sea
Climb the bow of the shipwreck
Build a ferris wheel in one of the camps
Use the cannon in Old Castle and become rocketman!
Unlock all skills
Reach level 10
Find and open 20 crates!
Find Dr. Wolf's practice
Repair 50% of all broken things in the park
Trade resources at a marketplace
Pew 200 times
Collect coins from a food vendor
Finish the campers' wishlist in one camp