4. Sky Garden, Ireland
This amazing place was created by a famous concept artist, James Turrell. Through a tunnel, you can get to the center of the crater, because the idea was for people to go through a dark tunnel and go towards the light as if they were being born again. The crater is located on the Liss Ard Estate in Cork, Ireland, where there are also beautiful large lake gardens.
5. Jeju Island Seongsan Ilchulbong Peak, South Korea
This dormant volcano is known to be one of the most important natural attractions in South Korea. It can be seen from every point on the island, and the last eruption occurred in 1007.