New computer model of Ipatiev House lets you wander around the residence where the Romanov dynasty was obliterated.
Image goes on display at new Tobolsk museum dedicated to the exile of Nikolai II and family shortly before they were shot.
Crown Prince's spaniel saw the Romanov family gunned to death before his epic escape.
It was in August 1917 - 95 years ago this month - that the abdicated emperor and his fearful family departed Tyumen into their Siberian exile.
Secret KGB documents and a book by ex-FSB colonel kickstart 100 year old search for missing Romanov treasures and valuables.
Tsar's daughter may, after all, have escaped the execution which wiped out the royal family, says new book.