Aokigahara

Aokigahara (青木ヶ原?), also known as the Sea of Trees (樹海, Jukai?), is a 35-square-kilometre (14 sq mi) forest that lies at the northwest base of Mount Fuji in Japan. The forest contains a number of rocky, icy caverns, a few of which are popular tourist destinations. Due to the wind-blocking density of the trees and an absence of wildlife, the forest is known for being exceptionally quiet.