Putrajaya is the home of the Malaysian government. It sits approximately 25 km south of Kuala Lumpur, next to Cyberjaya. Planning and construction of Putrajaya began in the early 1990s. The seat of government shifted to Putrajaya in 1999, from Kuala Lumpur.
The area does include housing, which is wise, but is dominated by large government building, many with interesting architecture, and wide causeways. 38% of the city is reserved for green spaces (including waterways).
The architecture really is quite interesting. I would suggest spending some time in the area walking around. I was very happy with my taxi driver, Suria, +60 016-365-2046 who drove from KL to Putrajaya and showed me around and drove back. He gave fair rates and can help with our tourist destinations. He speaks english very well. I like to walk around, if I had to do it over again I might well take 4 hours to just walk around. Taxis and public transportation in Putrajaya still are fairly limited so that does add a bit of a challenge for planning.
I took all the photos shown in this post.