Hi there,
Thanks for getting in touch with us!
As you may already know, we are fairly limited in how much support we can give for custom development questions. That said, I’d be happy to point you in the right direction as much possible.
If you want to customize the default map view to show your venues for past events, then I’d recommend you take a look at the following thread where there are some examples on how to accomplish just that > https://theeventscalendar.com/support/forums/topic/show-both-past-and-future-event-pins-on-map-view/
On the other hand, you can also create a page where you can use the tribe_events shortcode to show a map view and use the “date” attribute to specify a date in the past > https://theeventscalendar.com/knowledgebase/embedding-calendar-views-tribe_events-shortcode/
Additionally, let me point you to the following extension that may be of help if you need to show a list of venues > https://theeventscalendar.com/extensions/list-venues-and-organizers-shortcodes/
I hope it helps. Let me know if any follow up question.
Best,
Brendan