A short distance from Professor Paton's office/cabin there is a building that wasn't there before. From the outside it looks like an ordinary building if you paid no mind to the large sign above the door that said The Reptile Room. Or perhaps your eyes have already fallen upon one of the very large statues that sit on either side of the entrance to the building, a python and a lizard.
Once inside you will notice that the building is much larger than it appears from the outside. Every single creature has an tank/exhibit/area that is designed specifically for them and their needs and is larger enough for their comfort even if it may not look like. Remember children, magic is a beautiful thing. There are little cards on the glass of each tank with the species name, what abilities it has and whether or not the students are allowed to handle it.
If you would like to handle one of the creatures/or your own should you have one being housed here all you have to do is tap your wand against the glass and say "Alohomora". An area of glass large enough for you to get the creature in and out safely will open up for you. You may also help feed them, give them water or clean out their homes. All supplies are kept at the back area of the building and labeled neatly. There's also gloves handy in case if you would like to use those as well.