At first glance, they are barely there. But take a closer look and there's no doubting the phantom faces staring back at the camera. What's not certain is who they are... or how they got there. The pictures were entered into a competition to find the world's best ghostly goings-on captured on camera by amateur photographers.
Mirror image: Sceptics believe the face in a car, snapped in Mexico, could either be a reflection of a headrest, someone standing nearby or the result of digital manipulation
Face at the window: The winning picture shows a ghostly, elderly face - but could it be a tourist? In the ruins of a Scottish castle, an elderly woman apparently peers down from a window. She seems to be wearing centuries-old clothing, including a ruff. Even more bizarrely, according to the man behind the camera, no such figure was there when he took the picture
Spooky: The figure sports a ruff (possibly a scarf...) and appears to be gripping the railings
The image looks sinister - but was someone walking quickly past the shot?
The ghost on the beach: The photographer claims there is a figure in the water with its hood up - or then again, it could be an indentation in the rock face
If you look to the far left of this picture an apparition can be seen lurking in the trees. In a close-up, right, a head with two holes for eye-sockets can be seen in the top left-hand corner