For example there are two elf statues. You have 11 seconds to spot which object doesn't have a double. Oh, and some of the objects are turned upside down to confuse you further.

From optical illusions to world puzzles like Wordle, the internet is full of different method to put our brains to the test - and this "I'm sure you can't find the 4th object" picture is putting ...

That's the case in these amazing pictures captured by nature lovers from Poland to the US, who've found trees which had started to grow over objects like signs or benches and fences.