Ostia Antica is the map’s ancient port-city choice. Its exact location is Viale dei Romagnoli, 717, 00119 Roma RM, and its identity is separate from the Imperial Ports farther toward Fiumicino. That distinction prevents a common planning mistake: the two Ostia-area entries belong to the same broad harbor story but are different visitor-facing archaeological sites.

The supplied visit guidance allows 3–5 hours, reflecting an extensive archaeological area rather than a short monument stop. Roma–Lido rail to Ostia Antica followed by a short walk is the stated access pattern. Once there, extensive uneven terrain is a practical consideration, especially for visitors comparing it with the more contained museums in central Rome.

Ostia Antica requires a separate archaeological-park ticket. Current closures and first-Sunday arrangements must be verified rather than assumed. Choose this Place when the scale of an ancient port city is central to your plans; choose the Imperial Ports instead when the named destination and visitor entrance on Via Portuense are the relevant match.