We drove north. Our plans were vague but involved following the coast road around the north end of the island, so we were quite surprised when the road swung far inland. We presumed we were still on the main road so we carried on, but it got narrower and narrower, and higher and higher. When we started to pass through tunnels which were just hewn from the bare rock, we decided we must have taken a wrong turning somewhere.
We guessed that if we carried on, we'd get back to the main road. After an hour or so we began descending again, and eventually we did reach the right road. As we rounded a turn to look south, we could suddenly see the Isaac Newton Telescope perched on the mountain top high above us. We decided to head up there.