You can see what the Clayverse looks like and all the key points such as hubs, stations, tents, and the After Dark Disco to name a few things. The whole world is split into 3 sections:
Depending on which NFTs you owned you could have minted from a specific plot of land. For example, if you had a Clay Nation then you would have had the opportunity to mint a Sonic World Village plot of land.
Right now you cannot mint the plot of land as that phase was over. The only way to acquire the land is to buy them off a marketplace such as the JPEG Store.