No, they are both open air stadiums.
there are 20 stadiums with natural grass left
There are 1000's including NFL Stadiums, smaller league stadiums, high school fields, etc. But there are 31 NFL Stadiums.
I looked on www,cbssports.com and I found there where 7 teams with domes.
The answer is: 2,191,317 total people could fit in to all of the NFL Stadiums that are currently in the United States.
Capacity varies - most stadiums hold 66,000 to 70,000.
The amount of seats in a NFL stadium depends on the size of the stadium. Some stadiums in the United States are much larger than others.
Six NFL teams played in domes: St. Louis Rams New Orleans Saints Minnesota Vikings Detroit Lions Indianapolis Colts Atlanta Falcons
the biggest NFL stadiums are the dallas cowboys and the Houston Texans.
Some stadiums have grass and some stadiums have turf.