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src/main/java/eu/simstadt/regionchooser/RegionChooserUtils.java

 package eu.simstadt.regionchooser;
 
 import java.io.IOException;
+import java.nio.file.FileVisitOption;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.time.LocalDate;
@@ -152,7 +153,7 @@ public static CoordinateReferenceSystem crsFromCityGMLHeader(Path citygmlPath) t
 	 * @throws IOException
 	 */
 	public static Stream<Path> everyCityGML(Path repository) throws IOException {
-		return Files.walk(repository, 2)
+		return Files.walk(repository, 2, FileVisitOption.FOLLOW_LINKS)
 				.sorted()
 				.filter(
 						p -> Files.isRegularFile(p) &&