The dilapidated building was obviously vacant.
The house down the street is vacant
the new house had a sign saying vacant in the back yard.
It seemed remarkable that such an amazing house had stayed vacant for so long, until they found out that there had been a murder-suicide inside it, and it was rumored to be haunted.It was remarkable...
Vacant means Empty, therefore, a sentence you could use is: "The parking-lot is completely vacant."