30 St Mary Axe (formerly the Swiss Re Building) - a skyscraper in London's financial district, the City of London, completed in December 2003 and opened at the end of May 2004. With 40 floors, the tower is 180 metres (591 ft) tall, and stands on the former site of the Baltic Exchange building.
Flatiron Building also known as the Fuller Building. It can be found in Manhattan, New York and it’s a spectacular skyscraper. The construction on the building was completed in 1902 and back then it was one of the tallest buildings in the city. The name of the building makes reference to its resemblance to a cast-iron clothes iron.:
Sydney Opera House located in Sydney, New South Wales, Australia. It was conceived and largely built by Danish architect Jrn Utzon, who in 2003 received the Pritzker Prize, architecture’s highest honour. The Opera House was made a UNESCO World Heritage Site. It is one of the world’s most distinctive 20th century buildings, and one of the most famous performing arts centres in the world.