There are no vertical spreads built-in as far as i know. You will have to create a new document with a page size of 2x the height. For example if the page size is A4, start a new document without spreads and set the page size to 210x594mm.
Or, you could try this workaround, however the post is quite old and not sure if this works in recent versions of InDesign. Some comments there saying it does not work with ID CC.
If you're making a calendar or some other item with top binding, note you may actually not need to prepare this vertical page flow in InDesign. Just sending single non-facing pages to the printer could be enough. It will then be their job to set the machines so that the product ends up with a top binding.