Mt Saint Helens about 8 years ago. There wasn't much to look at. The lake was half filled with debri and there was very little vegetation. There was, however, life. In a small area that seemed to have no life had a single flower growing. It was purple and surrounded by smooth, grey stones. There was a shrub 10 feet from the path and me. Behind it a Bald Eagle stirred and took off in flight.
If you ask me tomorrow I may give you a different answer but right now the one that stands out in my mind is standing at the summit of the JA Volcano on the West Mesa on a sweltering June day, looking down upon wide open desert in one direction and the city of Albuquerque in the other...felt like being on top of the world. Of course if you are talking about peacefulness rather than grandeur, I'd have to say Jekyll Island...so tranquil.
Masai Mara - where i was able to observe the wonderful animals rooming around free in there beautiful home nature. Nice Safari Hotel/lounge, sleeping in a tent filled with fantasy and one own's servant.
I, being of the constitution that carries with me an insatiable wanderlust, would LOVE to know the most exciting place you have ever been and why. Whether close to home or far away...Let us feel your experience! Oo La...