/common/segments.proto 

--- v15/common/segments.proto   2024-02-20 20:28:59.000000000 +0000
+++ v16/common/segments.proto   2024-02-20 20:29:03.000000000 +0000
@@ -65,9 +65,18 @@
   // Activity account ID.
   optional int64 activity_account_id = 148;

+  // The city where the travel activity is available.
+  optional string activity_city = 185;
+
+  // The country where the travel activity is available.
+  optional string activity_country = 186;
+
   // Activity rating.
   optional int64 activity_rating = 149;

+  // The state where the travel activity is available.
+  optional string activity_state = 187;
+
   // Advertiser supplied activity ID.
   optional string external_activity_id = 150;