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