In unusual but true stories this week, we have the world's first under-ice photo exhibition, a vet for sea turtles, an upside-down house in Turkey, a medieval castle for a Middle Ages-themed birthday party, and portraits made of coins.

All the odd and interesting anecdotes from around the world are here in our review.

World's first under-ice photo exhibition in Russia

A photographer has created the world's first under-ice art exhibition, showcasing his work in an underwater art gallery.

He hung his work from ice in the Arctic Circle in ?2 C water, with one shot showing an unusual fish observing a picture of one of its own species.

Photographer Viktor Lyagushkin used a Nikon fisheye lens with a focal length of 8-15 mm and minimum focusing distance of 10 millimeters for this collection, and said that his photographs "look like portals to another world".