United Arab Emirates

This segment from NPR looks at plans for the carbon-neutral Masdar City in Abu Dhabi.

This slideshow from Slate looks at the elaborate plans for new cities in the United Arab Emirates, and compares them to other built-from-scratch cities in history.

Plans for a 4.6 km tramway have been announced for downtown Burj Dubai -- a $136 million transit system intended to link major developments in the rapidly rising emirate.

With rising sea levels and a penchant for ambitious new building ideas, Dubai is moving forward with plans to construct floating buildings and islands.

Five prominent ecocity experts weigh in on the Masdar City project in Abu Dhabi.

In his 1.5 billion square-foot master plan for a waterfront city in Dubai, architect Rem Koolhaas has proposed a dense and elaborate city, but one that doesn't try to rely too much on flashy high-end architecture.