In the Trás-os-Montes region of northern Portugal, there is a place called Torre de Dona Chama. It is an ancient place established in the 8th century, and named after a noblewoman who owned a castle there. There was once a story of an enchanted well haunted by a Moorish maiden cursed to be a snake.
The area has witnessed the invasion of Romans, Moors and Christians through the centuries. In 1758, ceramics, copper and bronze utensils were discovered at the remains of a settlement on Monte de São Brás, which would have been the original site of the Tower. It was later moved to the foot of the same hill. The origins and age of the "haunted Moorish well" story appearing in the St. Louis Post Dispatch, 1889 remains unknown.
Stories of haunted wells are common everywhere in Portugal. They take various forms. In the Castle of Torre de Dona Chama in the wild mountains of Traz os Montes is an enchanted well. Here the Moorish maiden has appeared more than once. She is seen in the likeness of a woman to the waist; thence her form ends in a serpent's coils. So appearing once to a young peasant of the neighborhood, she offered untold wealth if he would disenchant her.
Stranger Than Fiction Stories by M.P. Pellicer