Halloween symbols. In the 1500's and 1600's, people in Europe believed that the devil made witches do evil deeds. Over the centuries, people came to imagine that witches—and sometimes their animal companions, often black cats—rode through the night sky on Halloween. Throughout the ages, superstitious folk thought that fairies and ghosts could be asked for help casting spells or seeing into the future on Halloween. These supernatural creatures were not always friendly, and people sometimes carried turnip lanterns carved with grotesque faces to keep them away. In Scotland, people lit huge bonfires on hillsides to drive away evil spirits. For centuries in Europe, people remembered the dead at All Saints' Day and All Souls' Day (November 2) with bonfires. Although bonfires are less common on Halloween today, people still mark the night with candles burning in jack-o'-lanterns. In addition, although most people do not believe in ghosts or witches, these supernatural beings remain symbols of Halloween.