Translation of collar in Spanish

We made a little walk into the main street of the town and were looking for a nice place to eat. This time we settled for an Indian restaurant close to the restaurant we were a night earlier.
I wish you would help me to improve my Spanish. I am studying law in Germany and I am trying to learn Spanish. I hope you can help me and I could help you to learn German. Have a great day.
We than found out that a plane was leaving 3 hours later to the city of Calama (with the national airline), which was the closest airport to our destination. However, only one seat was available. That was really annoying.