Can you spot what's so wrong with these pictures?

These girls have all decided to strike a specific pose for this photograph and it appears the swimmer behind them wanted to join in. Photo / reddiholix

These pictures might appear to be innocent at first but try looking a little closer.

From naked photo bombers to secret messages and dogs in lectures, nothing is quite as it seems.

The collection of pictures have been compiled by Bored Panda and will really surprise you when you spot what's wrong.

Some are funny, others are creepy and some are just really strange.

They might just make you look again at any photographs you take in the future.

You never know what - or who - is lurking in the background.

These funny-when-you-see-it photos will keep you amused all day.

This might look like a normal family photo but can you spot the person being sat on below the mother? Photo / Reddit

What might have been a photo for the family album has been slightly ruined by the nudists behind them on the top right. Photo / hannahrowsiee

What looks like some girls just hanging out in the bath suddenly becomes a bit more sinister when you spot the person with their hand pushed up against the glass behind them. Photo / Imgur

One man decided to show off his injuries for the camera but didn't realise that his friend was showing off too behind him. Photo / sudz705

When you try to take a seductive selfie, make sure your dog isn't drinking out of the toilet bowl first.

This photograph of a group of mini football players might appear normal at first but the player on the left of the back row appears to have pulled his shorts down. Photo / scooby303

Proud of his graduation photograph, one person decided to take a picture of the framed photo - but he probably should have put some trousers on first due to the reflection. Photo / ReigningHate

This might look like a nice picture of a boy and girl at first but a girl falling down the stairs behind them slightly steals the thunder. Photo / KosherKitten

This elderly man proves he still knows how to have fun - just look at what his socks say. Photo / neekoriss

When your parents want a picture of you from your prom, always make sure that they are wearing clothes first - especially when there is a mirror. Photo / gamer6663

You might be thinking that this women is deep in thought but look closely and you'll see that it is in fact her foot on her chin.

When a teacher was asked for a photograph, he probably wasn't aware that the reflection in his glass desk made it look as though he had wet himself. Photo / CptSandbag73

Can you spot the child that has managed to squeeze themselves into the photo? They are peeking out from between the couple in the middle. Photo / Reddit

When you're left alone on the dance floor, sometimes you just have to embrace it - or embrace yourself. Photo / occupyfacebook

Can you spot what's hidden in between the trees? Something rather camouflaged is lurking in the background on the right . Photo / JDK

It seems lurking children are a common theme as one nestles themselves between the suited up men.

When a couple tried to take a pretty prom picture, they probably weren't expecting a dog walker across the street to expose themselves. Photo / misterman73

What appears to be a cute couples photo is ruined by the woman behind them grabbing a man's crotch.

Do you see the dog trying to be a part of this garage picture? Look at the cat flap and you'll see it. Photo / jarabara

Is this mother-to-be about to have a baby or a pet? This scan seems to show a very cat-like image in the top right hand corner. Photo / Reddit

Did the photographer know when they took the photo that there was somebody hiding beneath the bed? Their eyes can be spotted in between the mattress and the bed on the right hand side.

This dog is showing off an impressive trick by managing to fit in not one, but two balls in his mouth.

This might look like a normal lecture but if you look closely at the middle of the crowd, there is a furry guest sitting between the students. Photo / theloudlaugh

One cheeky student on the front row decided to fool the photographer by being naughty and is shown sticking his fingers up to the camera. Photo / LikesFemales

This might be a Microsoft presentation but the speaker quite obviously uses Apple products themselves. Photo / Frederik Temmermans

These three girls should have thought more about what they were wearing before they took this photograph - the girl's tshirt on the right appears to be biting her friend in the middle. Photo / Yunglil

How many Halloween costumes can you spot in this picture? It seems there might be one hiding on the right hand side. Photo / Dallasarcher

There is something not quite right with this photo. Who does the hand on the woman's shoulder belong to? The man seems to have his by his side. Photo / Hollywood182