To determine which place is located at the coordinates (4, 1) on the park map, we can analyze the points described:
- Nature Center is at (1, 1).
- Duck Pond is at (1, 4).
- Observation Tower is at (3, 3).
- Picnic Shelter is at (4, 1).
Since Picnic Shelter is the only place located at (4, 1), the answer is:
Picnic Shelter