The Astronomical Clock (Prague, Czech Republic)
I was recently in Prague and there was one touristy thing I have wanted to see there for some time now. That being the astronomical clock or the Prague Orloj. It's an absurd feat of time-keeping engineering. It is even more impressive when you think about the fact that the clock is over 600 years old and still functioning. Making it the oldest functioning clock of its kind in the world.
The clock has too many features to list out here, but here's a nice video breaking it down:
