Ivanov at Varna, Bulgaria | Lost city | Grave found of early advanced civilization | 5000 BC. This was a very important archaeological find | Predates most well known civilizations in Egypt, Mesopotamia, etc. Hidden civilization was found because they were digging to put in electrical wires! Entire civilizations can be taken out rather easily by nature it seems.
330-300 BCE. Bronze Portrait of Seuthes III found in a stone-lined pit in front of the entrance to his royal tomb in Bulgaria. The Thracian Ruler of the Odrisian Kingdom waged battle against Macedonian rule. Unearthed in 2004.
The Ancient Thracian Stone Circle (Cromlech) at Bulgaria's Staro Zhelezare after its discovery and excavation by late Bulgarian archaeologist Georgi Kitov in 2001. Photo: Georgi Kitov/Staro Zhelezare Facebook Page