A view of the Memorial House of the Bulgarian Communist Party on mount Buzludzha September 12, 2014. The monument was officially opened in 1981 by the Bulgarian Communist regime to mark 100 years of the set up of an organised Socialist movement, a predecessor of the Bulgarian Communist Party. The monument, no longer maintained by the Bulgarian government after the fall of the Communist regime in 1989, is now abandoned and vandalized. Picture taken September 12, 2014. REUTERS/Stoyan Nenov (BULGARIA - Tags: POLITICS SOCIETY) 

A monument is seen near the Memorial House of the Bulgarian Communist Party on mount Buzludzha September 12, 2014. The memorial house was officially opened in 1981 by the Bulgarian Communist regime to mark 100 years of the set up of an organised Socialist movement, a predecessor of the Bulgarian Communist Party. The memorial house, no longer maintained by the Bulgarian government after the fall of the Communist regime in 1989, is now abandoned and vandalized. Picture taken September 12, 2014. REUTERS/Stoyan Nenov (BULGARIA - Tags: POLITICS SOCIETY) 

Graffiti is sprayed near the main entrance of the Memorial House of the Bulgarian Communist Party on mount Buzludzha September 12, 2014. The monument was officially opened in 1981 by the Bulgarian Communist regime to mark 100 years of the set up of an organised Socialist movement, a predecessor of the Bulgarian Communist Party. The monument, no longer maintained by the Bulgarian government after the fall of the Communist regime in 1989, is now abandoned and vandalized. The writing reads: "Workers - men and women, from all countries, unite! Ahead! Comrades, let's bravely build up our great cause! Let's work, let us create - the worker we need to enlighten!". Picture taken September 12, 2014. REUTERS/Stoyan Nenov (BULGARIA - Tags: POLITICS SOCIETY TPX IMAGES OF THE DAY) 

A mosaic is pictured inside the Memorial House of the Bulgarian Communist Party on mount Buzludzha September 12, 2014. The monument was officially opened in 1981 by the Bulgarian Communist regime to mark 100 years of the set up of an organised Socialist movement, a predecessor of the Bulgarian Communist Party. The monument, no longer maintained by the Bulgarian government after the fall of the Communist regime in 1989, is now abandoned and vandalized. Picture taken September 12, 2014. REUTERS/Stoyan Nenov (BULGARIA - Tags: TRAVEL) 

A mosaic is pictured inside the Memorial House of the Bulgarian Communist Party on mount Buzludzha September 12, 2014. The monument was officially opened in 1981 by the Bulgarian Communist regime to mark 100 years of the set up of an organised Socialist movement, a predecessor of the Bulgarian Communist Party. The monument, no longer maintained by the Bulgarian government after the fall of the Communist regime in 1989, is now abandoned and vandalized. Picture taken September 12, 2014. REUTERS/Stoyan Nenov (BULGARIA - Tags: ENTERTAINMENT POLITICS) 

Picture shows the crumbling main hall of the Memorial House of the Bulgarian Communist Party on mount Buzludzha September 12, 2014. The monument was officially opened in 1981 by the Bulgarian Communist regime to mark 100 years of the set up of an organised Socialist movement, a predecessor of the Bulgarian Communist Party. The monument, no longer maintained by the Bulgarian government after the fall of the Communist regime in 1989, is now abandoned and vandalized. Picture taken September 12, 2014. REUTERS/Stoyan Nenov (BULGARIA - Tags: TRAVEL) 

A mosaic is pictured inside the Memorial House of the Bulgarian Communist Party on mount Buzludzha September 12, 2014. The monument was officially opened in 1981 by the Bulgarian Communist regime to mark 100 years of the set up of an organised Socialist movement, a predecessor of the Bulgarian Communist Party. The monument, no longer maintained by the Bulgarian government after the fall of the Communist regime in 1989, is now abandoned and vandalized. Picture taken September 12, 2014. REUTERS/Stoyan Nenov (BULGARIA - Tags: ENTERTAINMENT POLITICS) 

Murals of (L-R) Karl Marx, Friedrich Engels and Vladimir Lenin are seen inside the crumbling main hall of the Memorial House of the Bulgarian Communist Party on mount Buzludzha September 12, 2014. The monument was officially opened in 1981 by the Bulgarian Communist regime to mark 100 years of the set up of an organised Socialist movement, a predecessor of the Bulgarian Communist Party. The monument, no longer maintained by the Bulgarian government after the fall of the Communist regime in 1989, is now abandoned and vandalized. Picture taken September 12, 2014. REUTERS/Stoyan Nenov (BULGARIA - Tags: SOCIETY POLITICS) 

Photographers take pictures inside the crumbling main hall of the Memorial House of the Bulgarian Communist Party on mount Buzludzha September 12, 2014. The monument was officially opened in 1981 by the Bulgarian Communist regime to mark 100 years of the set up of an organised Socialist movement, a predecessor of the Bulgarian Communist Party. The monument, no longer maintained by the Bulgarian government after the fall of the Communist regime in 1989, is now abandoned and vandalized. Picture taken September 12, 2014. REUTERS/Stoyan Nenov (BULGARIA - Tags: ENTERTAINMENT POLITICS) 

A general view shows the crumbling main hall of the Memorial House of the Bulgarian Communist Party on mount Buzludzha September 12, 2014. The monument was officially opened in 1981 by the Bulgarian Communist regime to mark 100 years of the set up of an organised Socialist movement, a predecessor of the Bulgarian Communist Party. The monument, no longer maintained by the Bulgarian government after the fall of the Communist regime in 1989, is now abandoned and vandalized. Picture taken September 12, 2014. REUTERS/Stoyan Nenov (BULGARIA - Tags: SOCIETY POLITICS TPX IMAGES OF THE DAY) 

A view of the ceiling of the crumbling main hall of the Memorial House of the Bulgarian Communist Party on mount Buzludzha September 12, 2014. The monument was officially opened in 1981 by the Bulgarian Communist regime to mark 100 years of the set up of an organised Socialist movement, a predecessor of the Bulgarian Communist Party. The monument, no longer maintained by the Bulgarian government after the fall of the Communist regime in 1989, is now abandoned and vandalized. The text reads "Proletarians of all countries, unite!". Picture taken September 12, 2014. REUTERS/Stoyan Nenov (BULGARIA - Tags: SOCIETY POLITICS) 

Horses are seen near the Memorial House of the Bulgarian Communist Party on mount Buzludzha September 12, 2014. The monument was officially opened in 1981 by the Bulgarian Communist regime to mark 100 years of the set up of an organised Socialist movement, a predecessor of the Bulgarian Communist Party. The monument, no longer maintained by the Bulgarian government after the fall of the Communist regime in 1989, is now abandoned and vandalized. Picture taken September 12, 2014. REUTERS/Stoyan Nenov (BULGARIA - Tags: SOCIETY POLITICS ANIMALS) 

Star trails form over the Memorial House of the Bulgarian Communist Party on mount Buzludzha in this long exposure picture taken on September 12, 2014. The monument was officially opened in 1981 by the Bulgarian Communist regime to mark 100 years of the set up of an organised Socialist movement, a predecessor of the Bulgarian Communist Party. The monument, no longer maintained by the Bulgarian government after the fall of the Communist regime in 1989, is now abandoned and vandalized. Picture taken September 12, 2014. REUTERS/Stoyan Nenov (BULGARIA - Tags: POLITICS SOCIETY TPX IMAGES OF THE DAY)