Hands down, I don't even need to think about it. The answer always was, is and will be MOUNTAINS. My live for them is just endless. The thrill, the adrenaline rush, the adventure they provide, nothing can match it for me. The relief and bliss and the 'high' you get after a hard climb with sore muscles and sweat is just unforgettable and ecstatic. Beaches are a good place to chill, have fun and relax. But there is no thrill, no adventure, no hardships. But mountains and trekking and hiking and all that is something that gives you a high no other drug can.
But that is just my opinion. Though I would like to say,
The best view comes after the hardest climb.