The Astrodome

The astrodome was one of the first arenas with a roof over it. The field only cost thirty million dollars to build it. Very cheap right. Now a days you have stadiums like Yankee Stadium that cost approximately 1 billion dollars. The astrodome started off with regular grass in it and after the first series with the Yankees the grass died so they then had to put in plastic grass. This was known as AstroTurf.

There are a whole lot of crazy myths and facts that come into play with the astrodome. Engineers claimed they could make it snow inside the astrodome because of the capacity of the air conditioning system. Visiting teams believed that the astros used a system called roofing to make the home team long ball go further and the away team not.
http://www.ballparks.com/baseball/national/astrod.htm