A vibrant sunset reveals the rich colors of the sky from the tallest observatory in Jamsil, Sky Bridge in Seoul.   Sky Bridge is a short bridge at the roof of Lotte World Tower. It offers a chance for tourists to enjoy a clear view of Seoul from the sky.   A couple waves hello from the Sky Bridge, as they admire the captivating scenery of the sunset. (Photos: Yonhap) By Gha Hee-sun (lizka98@heraldcorp.com...