I love watches... There is nothing like Prague's Orloj. Every hour tourists line up in Old Town Hall to enjoy a mechanical performance which in the Middle Ages was considered one of the wonders of the world. I found it fascinating. The Prague Astronomical Clock, which for 600 years has been one of the greatest treasures of the city, still amazes people with its procession of Apostles, moving statues and visualization of time like no other instrument in the world.