Another option is the green roof. Cities all around the world have created “gardens in the sky” to cool down buildings. Temperatures there have surpassed 104 degrees Fahrenheit (40 Celsius ...

While most countries have just one capital city, a few around the world take a different approach, splitting national duties across two or even three capital cities. Whether for historical ...

So, you’ll be asked 25 questions about countries and cities that were once known by very different names. Your task is simple: match the old name to what the place is called today.

The Wetland Accreditation scheme, thanks to these new inclusions, now spans across 74 cities in 27 different countries. One of the new inclusions is Arles, which has a freshwater wetland called ...

On a smaller scale, cities in various countries also partner to form twin or sister city relationships. Sister city is a formal relationship between cities in different countries, are formed for ...