The Kjeragbolten boulder on Kjerag, a mountain in Rogaland, Norway (© Nataliia Anisimova/Alamy)

The Kjeragbolten boulder on Kjerag, a mountain in Rogaland, Norway (© Nataliia Anisimova/Alamy)

comments,

• If that boulder ever slips…""The drop is more than half a mile
• Hikers here earn unearthly views of the glacial valley.""A stern constitution is required
• A glacier lodged this rock in the crevice.""Nearby, an artist lodged some giant swords in the earth