The story of "Mae Nak" (แม่นาค) is perhaps the most famous of all Thai ghosts.
A famous shrine in Bangkok (ศาลแม่นาคพระโขนง) is located near Sukhumvit Road, Soi 101, inside Wat Mahabut. It is containing the grave of the dreadful ghost "PHI PHRA KHANONG" (ผีพระโขนง). This ghost has frightened Thai people since almost a century.
Last century, during the reign of King Mongkut (1851-1868), when Bangkok was still called the "Venice of the Far East", a woman called "NAK" was married to a man called "TID MAK". They moved into a house in Bangkok's Phra Khanong district, near Wat Mahabut. After a while her husband was called off to war. Alas she was already pregnant.