Hi Verytie. If you could define your question a little better it may help to get the answer you require.
My guess If you mean discover a other town, you do that through scouting on the world map. Once discovered, you can do neighbourly help and trade with out fee. When scouting its best to scout in a circle but you can scout directly to an active trader if you wish before returning to scouting in a circle.
Hahaha! I think they have us running in enough circles right now, thank you! However....., we could pillage and plunder with gates to other worlds???? Nah!
you can be related with other players' cities with neighborhoods (with scouting on your map) or with fellowship (you need to join with one fellowship) - no more ways to contact another city on app.
Still - if you play on PC, you can search other players cities by clicking on your ranking number and searching player names there, and so can visit all found cities.