I went this morning with my children to go to the new Please Touch Museum here in Philadelphia. I am constantly reminded of how much history there is in this town and what amazing things lurk Behind closed doors. The new Museum is located at Memorial Hall in Fairmount Park right outside of Philadelphia.
I highly recommend the museum if you have children, but what really amazed me was the Centennial Exhibition Display down on the lower level. There is an entire scale model of the Exhibition that is amazing. considered to be the first World's Fair - the Centennial Exhibition welcomed over 9 million people in 1876 to Philadelphia when the entire population of the country was only 46 Million. What struck me even more was the fact that the entire grounds and exhibition were entirely constructed in two years time. 
Let's think about that for a moment. They constructed a complete city over a 285-acre tract of Fairmount
Park overlooking the Schuylkill River. The fairgrounds, designed
almost exclusively by 27-year-old German immigrant Hermann J. Schwarzmann,
was host to 37 nations and countless industrial exhibits occupying
over 250 individual pavilions. One of the buildings - Was considered to be the largest building of its time in the world. All of this done without cell phones, televisions, marketing firms or twitter. There were no bulldozers, cranes or dump trucks at the time either.
When we think about what can and cannot be done these days - think of what was accomplished only 100 years into America's existence and see what resources this country can bring to bear when it puts it mind to it. With over 300 Million People and a $13 Trillion GDP - no telling what Hermann and his team could pull off in modern times. Anything is Possible.