دیگر نمره‌تان را حدس نزنید.بیایید با هم بالا ببریمش.

The quiet return of urban rivers

For much of the last century, many cities buried their small rivers under roads and car parks. Today, a growing number of planners are bringing them back into the open air. Opened rivers cool the streets around them and give fish and birds a way back into the centre.

In Seoul, a motorway was removed to uncover the Cheonggyecheon stream, and the new park now draws thousands of visitors a day.