Here are the messages encoded in the QR codes. I couldn't get a few of them to read, I would need to manually clear them up a bit for the reader to understand them. These are roughly left to right, top to bottom.

• You pass through two large iron doors into a large chamber. There are magical symbols inscribed on the walls. A strange mechanical sculpture of rusted gears and pipes dominates the space of the room. Beneath the sculpture is a vent emitting hot steam.
• You nearly fall into a pit of deadly iron spikes. You see a shadowy figure in your peripheral, but when you turn to look, no one is there.
• The corridor is lined with pulsating light bulbs in iron sconces. In an alcove there is a fallen statue with an inscription “When azoth and fire whiten Latona, Diana comes unclothed.”
• A corridor is before you. There is a dim flickering bulb at the end of the corridor. You're not sure if it's your eyes adjusting to the low light or if you see a shadowy figure wavering in the distance.
• Skeletons hang from chains and manacles against the walls. The floor is covered with iron gears, rusted scrap metal, and empty glass vials. You discover a leather jacket.
• In a small damp room there are metal gears exposed in the eroding floor. The gears are rusted and beyond repair. A clanking sound can be faintly heard in the distance. Someone has scrawled “He who can burn with water and wash with fire makes a heaven of earth and a precious earth of heaven.”
• An iron chandelier hangs from the ceiling here. There is a bookcase, you discover it pivots smoothly and reveals a secret door. In the small secret room there is a book lying open on an iron podium. The book is titled "Mechanica Mathematica," there are pages torn out.
• The walls have been engraved with geometric patterns. An iron altar sits in the corner of the room with an inscription “If you make the earth fly upside down, with its wings you may convert torrential waters to stone.”
• There is an iron passageway, it is very dark, you walk slowly with your hand against the wall guiding you... just in case. You come across a fortified iron door guarded by two mechanical gargoyles. There is an inscription on the door “The dragon guards the key.”
• http://i.imgur.com/Uh3Cfiu.jpg
• http://i.imgur.com/L3R809v.png
• You are in an iron chamber. There are strange mechanical devices strewn about the room. It is dusty and the air is stale. On the wall someone has scrawled “The diameter of the sphere, the tau in the circle, and the cross of the globe bring no joy to the blind.”
  
• http://textadventures.co.uk/games/view/5craldfdmkkzngf1davsna/days-destroyed
• You are in a large chamber, there is a domed ceiling above you. An iron sarcophagus sits in the center of the room with an inscription that reads “SI SEDES NON IS.”
• http://i.imgur.com/qto5RaC.png

It seems to have something to do with https://en.wikipedia.org/wiki/Porta_Alchemica

The picture has many cells and the colors and triangles could all hold information. The QR codes are all also on specific coordinates in the grid, this is likely to be meaningful. They each have four or six studs around them, and the embossing on the QR code pattern itself has its light and shadow from different directions.

The html title for the image is "pipedream portal".

I couldn't get anywhere in the text adventure yet.