The cache isn't at the posted coordination.
The cache is near the National Palace Museum.
The puzzle
North
East
Answer Form
N25 XX.XXX E121 XX.XXX
You can validate your puzzle solution with certitude.
Hope you enjoy the puzzle and the museum.
Hint for puzzle : Use two-digits number to fill in the answer form and the trick is deleting.
The cache is inspired by GC1DZEZ.