The Semmering Railway is regarded as the world's first mountain railway line, opening in 1854 and crossing more than 40km of the Austrian Alps. AFP
The vast military cemeteries of the First World War's Western Front serve as a poignant reminder of the tragedy of war. Photo: Toerisme Vlaanderen
The Dutch Water Defence Lines is one of the largest World Heritage sites and stretches for 200km, protecting cities including Amsterdam. Photo: New Dutch Waterline
The Bamiyan Buddhas in Afghanistan. EPA
Four sites that commemorate the Rwandan genocide of 1994 were designated a 'Place of Memory' by Unesco last year. AP
Robben Island, located off the coast of Cape Town, is best known for the prison in which Nelson Mandela was held for 18 years, until 1982. AFP
The Semmering Railway is regarded as the world's first mountain railway line, opening in 1854 and crossing more than 40km of the Austrian Alps. AFP
The vast military cemeteries of the First World War's Western Front serve as a poignant reminder of the tragedy of war. Photo: Toerisme Vlaanderen
The Dutch Water Defence Lines is one of the largest World Heritage sites and stretches for 200km, protecting cities including Amsterdam. Photo: New Dutch Waterline
The Bamiyan Buddhas in Afghanistan. EPA
Four sites that commemorate the Rwandan genocide of 1994 were designated a 'Place of Memory' by Unesco last year. AP
Robben Island, located off the coast of Cape Town, is best known for the prison in which Nelson Mandela was held for 18 years, until 1982. AFP
The Semmering Railway is regarded as the world's first mountain railway line, opening in 1854 and crossing more than 40km of the Austrian Alps. AFP