Right, ready for another geography question? (I hope you are enjoying these questions as much as I am). Here is a satellite image of the area near where we are staying in Hawaii:
The city of Honolulu is on the left (west) of the image - if you follow the coast line to the right (east) you can see a peculiar circuliar feature on the headland - the question is: what is that feature?
To help you with working out what it could be, here is a picture from the circle towards Honolulu:
It's quite high up, isn't it? So, a good clue for you to think about. Answer in a few days.
