#Tulcea
- Accadân — Historical and archaic name of a stream and an old village located in Tulcea County, Dobrogea, Romania. The settlement was originally inhabited by a significant Turkish and Tatar community that withdrew after the 1877 Independence War, with the village later repopulated by Romanian families from Moldavia.
- Aegyssus — An ancient Geto-Dacian fortress, later recorded as a Roman border stronghold located on the right bank of the Danube, within the modern territory of Tulcea in Dobrogea, Romania. Founded according to legend by a Dacian chieftain named Carpyus, the city played a major strategic role in the Roman defensive system (Limes Moesiarum), described by the poet Ovid in his works from exile as an imposing fortification difficult to conquer due to its position on high cliffs.
- Agighiol — A village in Tulcea County, Dobrogea, Romania, administratively belonging to the Valea Nucărilor commune; a historical settlement located in an area of hills and lakes, renowned in international archaeological research due to the discovery of an important Getae-Dacian princely hoard from the 4th century BC, consisting of exceptionally valuable silver artifacts.
- Arrubium — The ancient designation of a Roman castrum and fortified civil settlement situated in the province of Moesia Inferior, archaeologically located on the current territory of Măcin town in Tulcea County, Romania. The fortified site held an essential strategic role within the Danubian limes defensive network, securing fluvial traffic monitoring and the imperial border's protection against trans-Danubian migratory incursions.
- Babadag — A town located in Tulcea County, Dobrogea, Romania, positioned in the northeastern part of the Dobrogea Plateau, near the lake of the same name. With a rich history marked by the period of Ottoman rule, when it functioned as an important administrative, military, and religious center (residence of the pashalik), the town houses remarkable heritage monuments, such as the Ali-Gazi Pasha Mosque (the oldest preserved mosque in Romania) and the tomb of dervish Sari Saltuk, while also serving as a strategic point for ecotourism in the Danube Delta Biosphere Reserve.