Glastonbury Tor, England
Rising out of the middle of the Summerland Meadows in Somerset, England, is a hill that has long had magical connection. For centuries, Glastonbury Tor (Celtic for "hill") has been a source of myths: Some ancient Celtic civilizations considered it the entrance to the home of the Gwyn ap Nudd, alternately regarded as Lord of the Underworld and King of Fairies (a theory that resurfaced in the 19th century), while pagans may have used it for ceremonies celebrating the Goddess.
Later, the site was considered a possibility for King Arthur's Avalon, since Arthur and Queen Guinevere's coffins were supposedly discovered at the top of the hill in the 12th century. And even more recently, theorists have linked the hill to the quest for the Holy Grail. To further add to all the speculation, archeologists have found remains of seven deep, symmetrical terraces on the hill's slopes, which could be anything from Middle Age crop land to a Neolithic labyrinth.
Whatever the history, the hill is still thought to have spiritual energy, as visitors often report feeling more hopeful and positive after a walk on its slopes. Topped by the remains of the 15th-century church of St. Michael, the hill has been designated a Scheduled Ancient Monument, and is managed by the National Trust of the United Kingdom.