There are a number of things that I am thankful for that fall into the category of "something old".
The first three things that came to mind were...
The Bible...God's Word, although written in ages past, is still alive and relevant today. I do not know where I would be without it, honestly.
The Earth...although I may not agree with the age some scientists say, I know it has been around a long time. All the adventures of others before me has opened the world up to me to explore on my own and find treasure and make memories for years to come.
My Grandparents...at 90 and 91 years of age, respectively, my Grandma and Grandpa are still two of my favorite people ever. I have been blessed to have them in my life for so long!