The Pavillion, not only houses federal offices but also private businessess. It is a popular place for shopping and entertainment. It has a food court so a good choice to "do lunch" at one of several restaurants.
The impressive style is Richardsonian Romanesque architecture and it is the largest commercial building in Washington, D.C. There are interesting views to be seen from the tower, which makes this the third tallest structure in the city. National Park Rangers give tours of the tower, through the Pennsylvania Avenue National Historic Site
1100 Pennsylvannia Avenue
Metro Station: Federal Triangle
The Old Post Office
There are bells which apparently still work in the tower of the post office pavilion, although I actually dont know whether they still get used or not. If you go up in the lift to the top of the observatory you wont see them, but have to walk up the stairs and you can them see them through a glass window.
The photo is a bit dark though.
Fondest memory: feeling welcome to Washington DC, as Benjamin Franklin graciously waves to you from the front of the Old Post Office Building in downtown DC, it is a freindly town, even though it has a reputation of being a murder capitol, I never felt unsafe. And although full of 'politics' it still seemed REAL. You could really feel that Washington DC is the People's Town, the City that represents out country.
Favorite thing: The Pavilion, which is now a shopping center but which used to be an Old Post Office! It's located near the White House... which I didn't picture because there was a big tent obstructing the view :(