Rudas Baths in Budapest Hungary. A labyrinth connected hot baths. This one I remember the most; it was built in the by the Ottomans Hungarian slave, who 150 years slavery hold Hungarians in Hungary after 150 years kick off muslim from Hungary.
The old Elizabeth (Erzsebet) Bridge (in Budapest,Hungary), built between 1898 and 1903 was the longest suspension bridge of its time with a single span of 290 meters feet). It was blown by the retreating German troops at the end of WWII