Djenne Mosque, the largest mud structure in the world, UNESCO World Heritage Site, Djenne, Niger Inland Delta, Mali, West Africa, Africa

Ice climbing on Mont Blanc, Chamonix, Haute-Savoie, French Alps, France, Europe

Ice climbing on Mont Blanc, Chamonix, Haute-Savoie, French Alps, France, Europe

Chinese man with old costume, Great Wall at Mutianyu, Beijing, China, Asia

Man standing outside the Djenne Mosque, the largest mud structure in the world, UNESCO World Heritage Site, Djenne, Niger Inland Delta, Mali, West Africa, Africa

The Great Wall of China, UNESCO World Heritage Site, Badaling, China, Asia

Furstenzug on the walls of Dresden Castle, Dresden, Saxony, Germany, Europe

People on the Badaling section, the Great Wall of China, UNESCO World Heritage Site, near Beijing, China, Asia

Mursi tribesmen with face and body decoration, Mursi Hills, Mago National Park, Lower Omo Valley, Ethiopia, Africa

Couple with elevated view of harbour, Dalt Vila district and city defence walls, UNESCO World Heritage Site, Ibiza Town, Eivissa, Balearic Islands, Spain, Mediterranean, Europe

People on the Badaling section, the Great Wall of China, UNESCO World Heritage Site, near Beijing, China, Asia

Armed soldiers parade in ceremonial uniform in Abu Dhabi

Storm Barriers, Netherlands

Colombia father relating nicely to his son at a day care and child stimulation center run by dni (international defence of children) in barrancabermeja

Colombia father relating nicely to his son at a day care and child stimulation center run by dni (international defence of children) in barrancabermeja

Colombia father relating nicely to his son at a day care and child stimulation center run by dni (international defence of children) in barrancabermeja

Tourist balancing on Great Wall of China, Beijing, China

Greek soldier, an Evzone, outside the Presidential Palace, Athens, Greece

Greek soldier, an Evzone, outside the Presidential Palace, Athens, Greece

Greek soldier, an Evzone, on sentry duty outside the Parliament building, Athens, Greece

Greek soldier, an Evzone, outside the Presidential Palace, Athens, Greece

Statue for Catalan Volunteers killed in France and around the world for its defence of freedom, by Clara, Barcelona, Spain

Stone guardhouse on the walls of an old colonial-style fort on the seafront of Salvado in Bahia, Brasil

Guardhouse and lookout in an old historic fortress in the city of Salvador in Bahia, Brasil

Saluting Battery, cannon shot at 12 noon, cannon salute, view of Fort Saint Angelo, Valletta, Malta, Europe

Dogs fighting in a meadow; Otavalo, Imbabura, Ecuador

BULGARIA Sofia Guard of honour outside the Presidency Building Honor Travel Tourism Holiday Vacation Explore Recreation Leisure Sightseeing Tourist Attraction Tour Sofia Capital City Bulgaria Bulgarian East Eastern Europe European Calendar Vivid Vibrant Stunning Striking National Patriotic Country Ceremony Ceremonial War Uniform Tunic Power Authority Military Army Warfare Strength Soldier Presidential Presidency President Guard of Honour Honor Sentry Protect Protection Defend Defence Guardsmen Guardsman Security Outside Outdoors External Exterior Serve Safeguard Gun Rifle Arms Bayonet Man Male Red White Glove Gloved Hand Braid Pattern Patterned Tassel Standing Stood Stand Upright Vertical Attention Resplendent Neat Tidy Smart Defense Eastern Europe

BULGARIA Sofia Guard of honour marching during changing of the guard outside the Presidency Building Honor Travel Tourism Holiday Vacation Explore Recreation Leisure Sightseeing Tourist Attraction Tour Sofia Capital City Bulgaria Bulgarian East Eastern Europe European Calendar Vivid Vibrant Stunning Dramatic Striking Summer Bright Sunny Sun History Historic Historical National Patriotic Country Ceremony Ceremonial War Uniform Cap Helmet Tunic Power Authority Military Army Warfare Strength Soldiers Presidential Presidency President Guard of Honour Honor Marching March Goose Step Goose-step Stepping Sentry Protect Protection Defend Defence Guardsmen Guardsman Security Outside Outdoors External Exterior Serve Safeguard Pavement Sidewalk Changing Formation Street Boots Gun Rifle Arms Bayonet Feather Men Man Male Defense Eastern Europe

Greece, Attica, Athens, Greek soldiers, Evzones, beside Tomb of the Unknown Soldier, outside Parliament building.

Greece, Attica, Athens, Greek soldiers, Evzones, marching beside Tomb of the Unknown Soldier, outside Parliament building.

Greece, Attica, Athens, Greek soldier, Evzone, marching beside Tomb of the Unknown Soldier, outside Parliament building.

Greece, Attica, Athens, Greek soldiers, Evzones, marching beside Tomb of the Unknown Soldier, outside Parliament building.

Greece, Attica, Athens, Greek soldier, an Evzone, beside Tomb of the Unknown Soldier, outside Parliament building.