In Soviet times, it was rumoured that the KGB had files on absolutely everyone and that it had a base of operations in the Viru Hotel. The latter rumour turned out to be true. Those intrigued by the city's secret history can now take a guided tour of the KGB Museum, located on the 23rd floor of Sokos Hotel Viru. The tour can be followed by a visit to the hotel's Valuuta (Hard Currency) bar, another nostalgic nod to that bygone era.