Not literally of course. I was listening to Dan Carlin's excellent Hardcore History podcast on WW I, and heard him give examples of step-wise advances in technology. In passing, he mentioned the "Germanic barbarians'" awe at the crumbling Roman aqueducts, and that they must have wondered what fantastic civilization built them.
It got me wondering ... are there any other instances of groups of people or civilizations that encountered technology from long ago that was more advanced than their own? It's interesting to think about cases where civilization doesn't move "forward."
The Aztecs were in awe of the ancient city of Teotihuacan. In fact, they gave the city it's name, "Place of the Gods". The city had so many and such large constructions that it must have been built by gods. We don't actually know what language the people of the city spoke, what they called themselves, or what the city was called. There is one inscription from the Maya region that references a place called Pu, " place of reeds", which may be Teotihuacan. Not so much because there were reeds at the city, but there were so many people it was like a place full of reeds. Tollan means the same thing in Nahuatl and is actually a common designation for cities in central Mexico to denote large cities like Cholula which would be called Cholula Tollan. The Great Pyramid at Cholula has a similar mythical or fantastical mythology. In Nahuatl it is called Tlachihualtepetl, "artificial mountain", and was thought to be built by a race of giants because of how big it is.
This may be either an example you are looking for or clarification of Dan Carlin's passing comment. By the mid 5th century AD, Britain was no longer within Roman control or influence and the population centres such as London and Eboracum (York) were either depopulated or completely abandoned and left to the elements to decay.
While Germanic settlers and mercenaries had been extant in Britain even prior to the Roman withdrawal of the late 4th century and early 5th, as the centuries went by, memory of the previous inhabitants of the island passed into legend for native Britons and Germanic settlers alike.
Carlin is perhaps referring to an elegy called "The Ruin," written in the 8th century by an anonymous Anglo-Saxon that laments the 'host of heroes' that were 'skilled with stone, agile in art' who have 'gone, long since gone.' The author is clearly referring to the crumbling remains of Roman Britain. Here is the first verse translated:
As well-wrought as this wall was Fate fractured it, smashed this stronghold. Toppled towers, ruptured rafters Rot in rubble. Hail-hammered gateways Crumble with cold. Ruined roofs - Shattered shower-shields - eaten by age. Where are the wrights, wielders of wood, Sculptors in stone? In the grip of the grave, Gone, long since gone. Deep they decay While their works wither.
Translated by Graham Holderness, "The Ruin," Critical Survey, Volume 10, Number 2 (1998), 61.