White Tower, Rotunda, and Byzantine churches anchor the waterfront; Ladadika pulses at night. Compact center; buses and walking suffice. Student energy and markets give it a different feel than Athens.
Bougatsa is the city's claim to fame; trigona, gyros, and mezedes follow. Waterfront promenade and Ano Poli offer views and tavernas.
TopTenAtlas lists support food, stays, and day trips (Halkidiki, Meteora). Thessaloniki rewards travelers who want history and nightlife without the Athens crowds.