My great-great-great-grandpa left this note for my family when he passed away, but no one dared try it out.
On the tropical island located at 90.888°N, 123.456°E, there's a gallows where we used to hang criminals and betrayers. There are also a palm tree and a banana tree. Stand under the gallows and walk straight to the palm tree. Take note of how many steps you've walked. Turn right perpendicularly and walk the same number of steps. Take note of this spot and return to the gallows. Now walk straight to the banana tree and take note of how many steps you've walked. Turn left perpendicularly and walk the same number of steps. Walk to the spot you've noted previously and stop halfway. Dig down straight and the treasure will be there.
I've arrived at the island and found both trees. But there's no gallows visible, most likely because it has decayed completely in the centuries that have passed. Unfortunately, this means I can't follow the guide closely. The island is large enough that digging randomly will only be a waste of stamina, so I have no idea what to do next.
Can I find the treasure anymore or should I give up?