Kiev Station is the Moscow terminal for trains to/from Kiev and several international destinations including Belgrade, Zagreb, Bucharest, Budapest, Prague, Vienna, and Venice. The Akvarel Hotel is roughly 4km east of the station.
By taxi
It should take around 20 minutes to drive to the Akvarel Hotel. If you negotiate a cab on arrival, you should not pay more than $20, or you can book a transfer with a driver to meet your train here.
By metro
Take the dark-blue line from Kievskaya Metro Station (connected to the mainline station) and travel east three stops to Ploshchad Revolyutsii, which is approximately 400m from the Akvarel Hotel.
