For me it's not so much particular favourite places as what was happening in my life at the time I was there that makes them memorable and special. It's just the right confluence of circumstances such as the weather, the magic of light and sunsets, natural and manmade beauty, who you are with, maybe a time and location specific joke or funny event, sounds including water, birdsong or evocative music and your own mood at that moment in time. And often for me it is just being able to see to the far horizon with no trace of human occupation visible.