We were invited to Google's I Spy Edinburgh Party at the Camera Obscura tonight.

The Camera Obscura was somewhere we were tempted to visit but imagined it being filled with kids, so we were excited to hear Google had rented out the whole place just for the City Experts.

I'm not sure if it was the unlimited amounts of free wine and beer but it felt like the perfect venue for a party with mind-boggling holograms, illusions and pin-hole cameras.

The mirror maze and vortex tunnel were our favourite exhibits and both became increasingly more difficult as the night went on and we'd had more to drink.

The vortex made you feel as though the room was spinning upside down as you walked through it. It was a really unpleasant feeling!

Though it was too dark to see the camera obscura in action, the views over Edinburgh from the top of the building was amazing.

The photo booths at Google parties are always fun but this time we had some that could morph you in to manga, a baby or the last visitor to have their photo taken.

The party had a slight adult field trip theme so the food was inspired by school dinners with mini veggie burgers, mac 'n' cheese and beans on toast. There was also ice tea and coffee flavoured beer.

Things got even better at the end of the night when we discovered a piano staircase down to a squished penny machine and an Auto-Wed machine which married us an gave us a set of rings.

When Google held their party at the Camera Obscura a couple of months ago, it was nighttime and too dark to see the actual camera, so they invited us back to see it during the day.

The camera show was really good and it was fun hearing about Edinburgh's gory past but we weren't allowed to take photos as it would ruin the light.

The view from the top of the tower was amazing and we could see all the way across the Firth Of Forth to my Nana's house in Burntisland through the binoculars.

The exhibits hadn't changed much since our last visit but we had a quick spin around them, stopping in to the Ames room and Vortex before heading off in to the city.