TALL BUILDINGS

EDITH GREEN – WENDELL WYATT FEDERAL

BUILDING IN PORTLAND, OREGON.

The building houses 1,200 federal employees during the

working day and is now one of the most energy-efficient

office blocks in the United States.

SYDNEY'S ONE CENTRAL PARK

The heliostat can be used to provide both extra heating

or additional cooling, reflecting the sun into the building

or keeping it in the shade as required. One Central Park's

green credentials are further enhanced through its use of

solar panels to provide renewable energy and an advanced

water recycling system to reduce waste.

It stands at a modest 117m (384ft) tall.

ROTTERDAM IN THE NETHERLANDS

The 150m (492ft)-tall building is used for various different

purposes, including offices, apartments, shops,

restaurants and a four-star hotel.

THE CAYAN TOWER, DUBAI IN

THE UNITED ARAB EMIRATES.

It's actually the 17th highest building in the city at a

height of 306m (or around 1,500ft) and has been built to

cope with the intense sunlight, sandstorm flurries and

everything else that comes as part and parcel of its location.

As well as the apartments and penthouses, the building

includes a gymnasium, swimming pool, a kids play area,

massage rooms and a spa.

CCTV HEADQUARTERS IN BEIJING, CHINA.

This striking structure is home to the

China Central Television network.

NEO BANKSIDE TOWERS, LONDON

NEO Bankside comprises 217 residential units in four

hexagonal pavilions ranging from 12 to 24 storeys

and a six-storey office block.

BURJ DUBAI

The 829.m tall Burj Khalifa in Dubai has been the tallest

building in the world since 2010.

The Burj Khalifa has been classified as Megatall.

THE CN TOWER IN TORONTO, CANADA

The CN Tower in Toronto, Canada, was the world's

tallest freestanding structure from 1975 to 2007.