Sydney's Opera house was honoured for its enduring influence

A silver mine in Japan and an ancient fortress in Turkmenistan are also now on the Unesco World Heritage list.

Archaeological remains in Iraqi city of Samarra were inscribed and immediately registered as being in danger.

The organisation also agreed to change the official name of the Auschwitz Concentration Camp in Poland.

It will now be referred to as Auschwitz-Birkenau, German Nazi Concentration and Extermination Camp (1940-1945).

Poland sought the change to make clear it had no role in establishing or running the camp.

Majestic ruins

The Sydney Opera House, built in 1973, was named as a "great artistic monument accessible to society at large", Unesco said.

It was recognised as a great architectural work and urban structure that has had an "enduring influence on architecture".

SITES ADDED TO LIST Sydney Opera House, Australia Old town of Corfu, Greece Red Fort Complex, India Bordeaux, France Volcanic island of Jeju, South Korea Iwami Ginzan silver mine, Japan Parthian fortresses of Nisa, Turkmenistan Samarra archaeological city, Iraq Rideau Canal, Canada Mehmed Pasa Sokolovic Bridge, Bosnia-Herzegovina Teide National Park, Spain Primeval beech forests of the Carpathian, Ukraine Lope-Okanda, Gabon Richtersveld Cultural and Botanical Landscape, South Africa Twyfelfontein, Namibia Diaolou villages in Kaiping, China In pictures: New additions

India's Red Fort Complex, built as the palace fort of Shahjahanabad and completed in 1648, was honoured for reflecting "all phases of Indian history from the Mughal period to independence", Unesco said.

The Iwami Ginzan silver mine on Honshu Island in Japan dates back to the 16th Century. The Parthian Fortresses of Nisa in Turkmenistan contain the remains of two cities from the 3rd Century BC to the 3rd Century AD.

Samarra, considered a holy city by Shia Muslims, is home to majestic ruins along the Tigris river and a 9th Century mosque. Holy sites in the city have been the target of insurgent attacks.

Other sites added to the list include Gabon's Lope-Okanda landscape, the Richtersveld mountainous desert region of South Africa, Namibia's Twyfelfontein and 1,800 fortified tower houses in China's Guangdong province.

The UN cultural organisation has been considering bids from 39 different countries in its week-long meeting in Christchurch, New Zealand.

Around 45 sites are in competition to be added to the World Heritage list.