Some of the world's most well known landmarks turned green on Sunday (March 17) in celebration of Ireland's national holiday, St Patrick's Day.

Organised and coordinated by Ireland's tourism board, 2013 saw the Egyptian Pyramids of Giza and Brazil's Christ the Redeemer statue in Rio de Janeiro illuminated emerald green for the first time in the marketing campaign's fourth year.

Other landmarks that transformed for the 'Global Greening' campaign included the Little Mermaid in Copenhagen, the London Eye, Sydney Opera House, the Leaning Tower of Pisa, the Burj al Arab in Dubai, Table Mountain in South Africa, and the Gorky Park Gate in Moscow.

St. Patrick is the patron saint of Ireland and is credited with bringing Christianity to the country.

Tourism Ireland says over 70 million people around the world claim links with the island of Ireland.

According to the country's tourism board, the tourism industry contributes to about 4% of GDP, and employs some 200,000 people. It estimates about 7.27 million people visited Ireland in 2012.

Presented by Adam Justice