How would I go about doing up this coffee table?

My girlfriend and I were at our favorite coffee shop today and I mentioned to her that I’d love to be able to put together a coffee table like the ones that they had at the shop. The coffee tables were older/ a bit warn – but, aesthetically pleasing (nice style), and there were vintage photos placed randomly on top, which was then covered with some clear substance. I can’t remember the name of the stuff that they used on the top of the coffee table. Does anyone know? I’m pretty sure that they used a pourable epoxy resin. There was no glass on top of the table.