Unless you choose to take a taxi, the simplest way to reach the Kremlin from the Sheraton Palace Hotel is to take the metro from Belorusskaya Metro Station and travel south two stops to Tverskaya. Change there to the gray line and continue south one more to stop to Borovitskaya. Exit the metro via Aleksandrovskiy Sad Metro Station, and you will find yourself directly opposite the main visitor entrance to the Kremlin in the Kutafya Tower.
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