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Sintra & Pena Palace and Quinta da Regaleira
http://www.bbc.com/travel/story/20200220-the-mysterious-inverted-tower-steeped-in-templar-myth
https://www.bbc.com/reel/video/p07r1cbm/the-mysterious-inverted-tower-steeped-in-templar-myth
![Quinta da Regaleira's 'Inverted Tower'; Sintra, Portugal [640x426 - 88KB]](https://pic8.co/sh/Uep7Pc.jpg){kind=link}
(post is archived)