15 Oldest Structures in the World
![](https://i.ytimg.com/vi/umB8dzt7jgM/mqdefault.jpg)
8:19
Archaeologists discover 476,000 year old structure, thought to be oldest known wooden structure ...
![](https://i.ytimg.com/vi/GN1oE5gCY5o/mqdefault.jpg)
14:06
What's Below The World's Largest Castle? (Medieval Heating System Explored)
![](https://i.ytimg.com/vi/ddC6SeU5Rek/mqdefault.jpg)
29:31
15 OLDEST Walls That Still Stand Today
![](https://i.ytimg.com/vi/Aje6d7t_lOs/mqdefault.jpg)
46:36
Inside A Perfectly Preserved Early Tudor Mansion
![](https://i.ytimg.com/vi/foPlxyPuLgk/mqdefault.jpg)
45:59
The Big Bang: The Most Important Second In The Universe | Naked Science | Spark
![](https://i.ytimg.com/vi/FVVidEzn_fY/mqdefault.jpg)
7:44
What's The Oldest Surviving Building On Earth?
![](https://i.ytimg.com/vi/9Tzew9SSjbE/mqdefault.jpg)
26:22
15 LOST Cities Rediscovered
![](https://i.ytimg.com/vi/EBKeFGVXObA/mqdefault.jpg)
52:03