An Amtrak Regional Express departs Philadelphia, PA on a moody day in late March.
The skyline serves as backdrop, with the PECO building on the far left, Liberty One and Two to the far right and the Comcast Center (the tallest building in PA) stands directly in the center. The white building with the pyramid top is Mellon Center while the two identical buildings to the left of the Comcast Center are known as One and Two Commerce Square. Three Logan Square sits to the right with a staggered roof line. By 2017, a new building known as the Comcast Technology Center will appear next to the Comcast Tower towering 1,121 feet making it the tallest building in PA, and 9th tallest in the country.