For architecture buffs numbed by the ongoing global battle to crank out record-breaking tall buildings, here's something innovative to spark the imagination.
The South Korean government has granted approval to begin construction on the world's first "invisible" tower.
Designed by U.S.-based GDS Architects, the glass-encased Tower Infinity will top out at 450 meters (1,476 feet) and have the third highest observation deck in the world.
The project...
