This is interesting because we had a lesson in church on this very subject yesterday.
In the LDS Bible Dictionary it states:
"According to the Old Testament, things or places were holy that were set apart for a sacred purpose;"
Ezekiel 22:26 - "Her priests have violated my law, and have profaned my holy things..."
In my life, there are at least three places that I know of that are set apart for sacred purposes.
The temple, where I go to make sacred covenants with God;
the home, where I was taught and will teach my family about God;
and the chapel/church, where I go to renew the covenants that I have made with God and make covenants through ordinances such as baptism.
You may be interested in this talk. It is what we discussed on the subject and was very inspirational to me. It is called "
Standing in Holy Places."