It can often be a challenge to know which walls you can remove prior to a renovation. Looking for key structural elements in your cellar is a great way to start. In general, any sort of columns will be carrying loads from above.
Using a floor plan, you can track these columns through your building to see where they land on each floor. However if your project is a full-gut renovation, structural elements are less of a concern and you’ll have more freedom to create new structures as needed. Remember – nothing is impossible! A great architect and engineer will always be able to help you find a practical solution to open up your space.