There’s a town in Germany completely surrounded by Switzerland!

Bsingen am Hochrhein, also known as Bsingen, is a German town that's just 7.62 sqkm (2.94 sq mi) that is entirely surrounded by Switzerland. It only has about 1450 inhabitants.
Since the 19th century, the town has been completely separated from Germany, save from a narrow strip of land that is about 700m wide. It is still, however an official part of Germany administratively, although it's part of the Swiss customs area.
The town is a tourist destination for German and Swiss people because of it's recreational areas along the Rhine. The town's football club is also the only German club to play in the Swiss football league.