We were going to say how did you get shots of the Belem without anyone in there exploring, but you got there early in the morning and filmed before the site was opened.
Great shots and we want to get a decent drone, but it costs $$$. We had a small test one costing us $30 and you already know the end of this story. You get what you pay for, did one flight and the battery went bust. Flight time- 7 mins whereas the charge up time is an hour. Not worth getting another one and we learnt our lesson. Also, the footage wasn't great at all.
DJI-Spark being one of the best in the business, we would have to save up for a few months (or years as there's other things to save up for too)/wait for it to become cheaper before we could think of purchasing one. Still dreaming and hoping. :)