Answer:
- The Inca road system is regarded as one of the greatest monumental engineering achievements
- Inca engineers tailored the road to the landscape, using containment walls, paving stones, and stairways
- Inca engineers were the first to build suspension bridges, which used thick cables to hold up the walkway
Hope this helps :)
The last one is false I believe. Very shortly after the site was uncovered, archaeologists came to excavate it, and the year after it was discovered they started building a museum on the site. Safe to say robbers probably would've had a hard time pillaging it when the whole archaeological community had their attention fixated on it.
