A walk along the river on the Longotevere Aventino will lead you past several fragments of buildings on the Aventine. Some are quite impressive though they are on private propoerty and only viewable from the road. Work is currently being done on them. Until further investigation bears new evidence, the nature of the buildings is unclear. They are likely a mixture of insulae and commercial buildings, considering their proximity to the ancient port area, though some parts are decorative, definitely indicating a domestic use.

Directly below the unsightly Vittoriano on the Piazza d'Aracoeli are the remains of some of the insulae that were destroyed to build the royal monument. This set of insulae has at one point been enclosed within the church of Saint Rita as it evidenced by the belfry and some wall painting visible in an alcove. The church has been moved to reveal the buildings within. This is a fascinating complex to view, as it exists on five floors, some of which are visible well below ground level.

Next to the Baths of Caracalla are a small collection of fragmentary walls and ruins within a small exercise park with a running track. Originally, this set of structures likely held a public function, and some of the architecture dates from the Severan period. Some of the remains have been identified as a nymphaeum and, since there is evidence of this later becoming a private bath house, it has been assumed that it belonged to a wealthy villa nearby. Evidence from the 4th century shows the addition of a grand vestibule, adding weight to the theory that this was part of a luxury villa. The site was destroyed by fire, probably in the early 5th century and consequently abandoned.