。
She visited not only Kyoto but also Nara.
Literal
She [topic-は] Kyoto [not-only-だけでなく] Nara [also-も] visited.
~だけでなく~も is a tidy 'not only X but also Y' construction, often used to add a second item to a list while emphasizing that the first wasn't the whole story. The verb 訪れる leans toward visiting *places* (countries, cities, sights) and carries a slightly more formal ring than 訪ねる, which is reserved for visiting *people*. Pairing Kyoto with Nara is culturally loaded: they're Japan's two earliest permanent capitals — Nara (奈良, 710–794) preceded Kyoto (then Heian-kyō, 794–1868) — and together form the heartland of classical Japanese Buddhism, temple architecture, and imperial history. Most sightseeing itineraries in the Kansai region pair them on consecutive days.