Kruschev was showing a party of British businessmen around the Kremlin. After an hour or so of intense indoctrination, one of the Brits piped up that he needed a call of nature.
Kruschev said "Follow me" and led them down a warren of corridors until they were led outside and down a few back streets, they eventually reached a grand building which they entered. The interior was beautifully preserved, with acres of marble, statues, gold leaf and many valuable paintings. Kruschev invited them to pee wherever they wished.
On completion of the necessary, one of the Brits, thinking of washing his hands, asked "What do we do now?"
Krushchev replied, "Run like hell, this is the American Embassy!"