What is "jungholz"

Jungholz is a town in the district of Reutte in the Austrian state of Tyrol that is only accessible via Germany. The lack of a road connection to anywhere else in Austria led to Jungholz being included in the German customs area until Austria joined the EU in 1995. Letters to Jungholz can be addressed with either a German or an Austrian postcode (D-87491 and A-6691, respectively).