There are mountains in Romania for example that slow the heart rate to rest and have healing properties they are still researching. But the heart rate thing is pretty obvious. People climb the mountain and as soon as they get close enough their heart rate goes to normal. You dont get tired there, you can exercise and your BPM stay steady. It is to do with an unexplained magnetic anomaly surrounding the mountain -- and something like that can be looked upon as both mystical and scientific.