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