Irazu Volcano is an active volcano in Costa Rica, with an altitude of 3,432 meters, and is the highest peak in the Central Mountain Range. It was originally very close from the capital San Jose to Irazu, only a few dozen kilometers, but we chose to return to the upper volcano from the distant Caribbean Sea, and stayed overnight in a mountain villa more than ten kilometers away from the volcano; the road to the volcano was originally very flat, but we were constantly navigated to dirt roads. Thanks to the help of simple mountain people, we went from the mountain road in Figure 9 to the 230 kilometers of the Holy Cross Cemetery, and then after several twists and turns, we turned to the correct 219 kilometers. The scenery is beautiful and the journey is winding. It took more than two hours to reach the top of the mountain. The scenery overlooking the Atlantic and Pacific Oceans can only be imagined, but looking down at San Jose at the bottom of the mountain is real. The volcano last erupted in 1978, leaving a crater with a diameter of 1,050 meters and a depth of 300 meters. There is a pool of green water at the bottom, which looks like a pocket version of Changbai Mountain Tianchi. There is also a dry crater with a diameter of 690 meters and a depth of 100 meters. The overall scenery of the volcano is beautiful and worth the trip. I will never forget the mountain people who showed the way. Three men with similar looks said at the same time that the Holy Cross Cemetery was ahead. A man carrying firewood put down his load and curiously said to his phone that the road was blocked.