Firstly, the Moscow Metro. I'd been told before that the Moscow Metro was very ornate, but wow! I was not prepared for just how beautiful some of the stations were!!
Here are some of the best:
Arbatskaya
Ploshchad Revolyutsii
Park Pobedy
Kiyevskaya
Kiyevskaya
Krasnopresnenskaya
Belorusskaya
Mayakovskaya
Mayakovskaya
Elektrozavodskaya
Elektrozavodskaya