Tallest Building In The World

Hours spent reading about buildings on Wikipedia.  Here's what my research has found:

The Burj Khalifa (aka Burj Dubai) is ridiculously tall.  At 2,717 ft it's taller than 17 state highpoints.

State	Peak	Height
Florida	Lakewood (Britton Hill)	345
Washington, DC	Fort Reno	410
Delaware	Ebright Azimuth	448
Louisiana	Driskill Mountain	535
Mississippi	Woodall Mountain	806
Rhode Island	Jerimoth Hill	812
Illinois	Charles Mound	1,235
Indiana	Hoosier Hill	1,257
Ohio	Campbell Hill	1,550
Iowa	Hawkeye Point	1,670
Missouri	Taum Sauk	1,772
New Jersey	High Point	1,803
Wisconsin	Timms Hill	1,951
Michigan	Mount Arvon	1,979
Minnesota	Eagle Mountain	2,301
Connecticut	Mount Frissell (South Slope)	2,380
Alabama	Cheaha Mountain	2,407

Its height exceeds the vertical climb of 36 highpoints (Florida, Washington, DC, Delaware, Mississippi, Ohio, Alabama, Pennsylvania, Kansas, Kentucky, Nebraska, Iowa, Indiana, Massachusetts, West Virginia, New Hampshire, Rhode Island , Missouri, South Carolina, New Jersey, North Carolina, Wisconsin, Louisiana, Arkansas, Hawaii, Illinois, Michigan, Tennessee, North Dakota, Georgia, Connecticut, Vermont , Minnesota, Maryland, Oklahoma, Virginia, South Dakota).

Next, Philadelphia continues to disappoint me.  Its tallest building doesn't even break 1000 ft.
https://secure.wikimedia.org/wikipedia/en/wiki/Comcast_Center_%28office_building%29

Comcast Center is a skyscraper in Center City, Philadelphia, Pennsylvania, United States. The 58-story, 975 feet (297 m) tower is the tallest building in Philadelphia and the fifteenth tallest building in the United States.

However, what I find really interesting is this.  "Leasing 1,094,212 square feet (100,000 m²), Comcast takes up 89 percent of the building."  That's equivalent to a square 1046 ft on a side.  Or, as the ever helpful Google tells me, 185 football fields.

https://secure.wikimedia.org/wikipedia/en/wiki/List_of_tallest_buildings_and_structures_in_the_world#History
The history of the world's tallest building is always fun to look at.  However, today I noticed something I hadn't noticed before.  The Washington Monument, in 1884, was the first non religious building to be the world's tallest.  Since then, no religious building has been the tallest.

Also I discovered this, which at first I thought was ridiculous.  But, now I think it is pretty sweet, although still ridiculous.
https://secure.wikimedia.org/wikipedia/en/wiki/Aerium