Two common platforms for virtual galleries are Deca and Oncyber. Deca is the most used platform for 2D galleries and allows you to place any NFT into a gallery, not only the NFTs you own yourself. Oncyber is the most used platform for 3D galleries and do require that you own the NFT to be able to put it into a gallery. ​ I'm using both platforms and they are both great. Deca is easier to get started with, at least when talking about their standard gallery format. Freestyle Deca galleries take a bit more work to do well, but look amazing when done right. ​ Oncyber galleries look amazing and have lots of cool features like "multiplayer" support. Getting started with Oncyber requires figuring out how to place NFTs into the frames they provide you, which takes a bit to get used to. When you've mastered that then there's really no limit to the 3D galleries you can create. Take a look at community-provided 3D gallery spaces too, they expand the possible scenery with many great options.