Casa Batllo (World Heritage Site) - One of 2 houses by Gaudí in Barcelona that can be toured. truly amazing and worth the visit. go in the mornings, before the site gets crowded with architecture students.
Amazing Architecture - Grand Staircase in House of Scientists, Lviv (Lemberg), Ukraine <= before 1945 = Lwów, POLAND => see history, actual till today ! https://www.pinterest.com/pin/349803096033334209/ & https://www.pinterest.com/szlachcic/news-ukraine-crisis-media/