Walk up all the way through the Old Town to Nebet Tepe (Sentry or Lookout Hill) for a panoramic view of Plovdiv and the surrounding mountains in the distance. The remains of the earliest settlement in Plovdiv are randomly scattered stones and some bits of wall but the vibes up here are very calming and it is a popular meeting place for young lovers.
Evidence suggests that the site was settled as early as 12th century BC as the ancient Thracian town of Evmolpia and later expanded by Philip of Macedonia. As the town expanded, Nebet Tepe became the citadel of the town's acropolis, the highest point of the three hills. There are remains of a fortress wall and tower. There is also a secret tunnel from the time of Justinian (4th century) leading down to the Maritsa river.