You show it to Mews and he says it is just some tires in the water. But look closely in the background. (!) Go back to Loch Ness and tell off the rowboat guy.
The actual Nessie photo you need is the THIRD photo you take at Loch Ness. On your first visit there, you get the camera and matches, and a rowboat ticket from the dart game at the Pub. But the photo you get is of truck tires, and a shadowy Nessie. On your second visit, you get a submarine ticket by playing darts again, but the photo you get is of a movie prop. After showing this photo at the Pub, you get to play for the Pennywhistle that lets you call the real Nessie, when you take a solo trip in the rowboat.
Harold Mews is real only on Poptropica's Cryptids Island.
The Cryptids Museum is on the first floor of the Mews mansion, to the right.
You bring back to Mews lab and show him the picture. (if this was taken on the rowboat with the guide then you will have to do some lab tests. If this is the real lochness monster you must take it back to Mews to confirm his existence)
When you come downstairs in the Mews mansion, and enter the museum at the right, your character will suggest watching the 5 videos on the cryptids. So you have to do that before Mews will appear again.
The heliport at Mews' house is out the door, then to your right. You cannot use the helicopter until you have reviewed all of the videos on cryptids and spoken to Mews.
It depends upon what you took a picture of. The first photo from Loch Ness has to go back to Mews. The second photo (from the sub) you take back to the pub. The photo of the footprint in the snow goes back to Mews eventually.
It is one of the locations on the helicopter GPS system on Cryptids Island. Once you are rescued by Mews, review the videos and you can go in search of the four cryptids.
After Mews leaves your room, drink the water and go downstairs, to the museum on the first floor (right). Watch the 5 videos and then Mews will arrive and you can begin hunting for the cryptids in his helicopter.
You awake in the Mews mansion. After he leaves, drink the water, go downstairs, and enter the museum (first floor right). Review all 5 of the cryptids videos and then Mews will join you.
In the museum, first floor right in the Mews mansion.
Go and meet Harold Mews.
Review the 5 videos in the museum, and Mews will appear to give you further instructions.