Gelonus

According to Herodotus (Histories 4.108), the Budini (neighbors to the Pontic Scythians) had a great wooden city called Gelonus:

They have a city built of wood, called Gelonus. The wall of it is three and three quarters miles in length on each side of the city; this wall is high and all of wood; and their houses are wooden, and their temples; [2] for there are temples of Greek gods among them, furnished in Greek style with images and altars and shrines of wood; and they honor Dionysus every two years with festivals and revelry. For the Geloni are by their origin Greeks, who left their trading ports to settle among the Budini; and they speak a language half Greek and half Scythian. But the Budini do not speak the same language as the Geloni, nor is their manner of life the same.

There is some debate among modern scholars as to whether there actually was a Gelonus and, if it existed, whether it was on the site of the Bilsk hillfort.