Check out these videos of Roman structures:
Colosseum:
Video Tour of the Roman Colosseum: https://www.youtube.com/watch?v=dX0SIb-3oYc
3D Video reconstructed Colosseum: https://www.youtube.com/watch?v=-oOgkPv6j6M
Pantheon:
Video Drone Footage of Roman Pantheon: https://www.youtube.com/watch?v=IGl1mhWXtII
Video Tour of Inside the Roman Pantheon: https://www.youtube.com/watch?v=ion33ahX6dQ
Aqueducts:
Explanation Video of How the Roman Aqueducts worked: https://www.youtube.com/watch?v=pAUqodcXyWQ
Roman Aqueducts: https://www.youtube.com/watch?v=y8W96WaobOs
Roads:
Explanation Video of Roman Roads: https://www.youtube.com/watch?v=bgv3BWnq8Wc