Like the Green Mill, the Green Door Tavern, another former speakeasy in the River North area, has kept much of its olde timey charm.

BBC: Speakeasies, moonshine and gangsters

"We've creatively looked for ways to fill in any talent gaps, " says Julie Mossler, a spokeswoman for Groupon, whose technology center is in the River North area.

WSJ: A Start-Up Ecosystem Forms in Chicago

Catapult Chicago, which opened March 5, for instance, occupies 12, 000 square feet, donated by a law firm, on the 25th floor of a skyscraper in the River North area.

WSJ: A Start-Up Ecosystem Forms in Chicago

"The Marcal river is dead, " said Tibor Dobson, spokesman of the Hungarian Disaster Management Agency - a reference to a smaller river which flows north from the disaster area towards the Danube.

BBC: Toxic sludge carpets homes in Hungary

Another, Iron Hammer, targeted the area near Hit, a Euphrates River town north of Ramadi.

CNN: U.S. military targets Ramadi area before election