In addition to the Rotonda, this is one of the two most characteristic monuments in town. The Galerius arch is situated close to the eastern city wall, a short distance from the Kassandreotiki gate. The 4th-century AD Roman emperor Galerius commissioned both structures to show off his power. A road used to run through the arch, past the Rotunda and on to the palace to the southwest. The arch is composed of a masonry core faced with marble sculptural panels celebrating a victory over the seventh emperor in the Sassanid Persian Empire. About two-thirds of the arch is preserved. Colloquially, the monument in known as Kamara, that's Greek for 'arch'.

The mythical Mount Olympus can be seen on the horizon from the waterfront in Thessaloniki. Many visitors choose to spend a day on a trip to the ancient Dion and Mount Olympus. You'll see the Dion Archaeological Park with city ruins dating from the 6th century BC and the most important spot in Greek mythology itself. If you're looking to go on a hike, there are guides that will take you along Enipeas Gorge in the foothills of Mount Olympus with spectacular waterfalls, numerous endemic species and picnic opportunities.

Zeitenlik is an Allied military cemetery dedicated to those who fought for freedom during the World War I. The cemetery is subdivided into French, Serbian, Italian, British Commonwealth, and Russian sections. Zeitenlik is the largest memorial park in Greece and is located about 1.5 kilometres from the city centre of Thessaloniki.

The city is famous for its religious diversity, with adherents of Catholicism, Orthodoxy, Islam and Judaism coexisting here for centuries. This is why Sarajevo is at times referred to as "Jerusalem of the Balkans", or "Jerusalem of Europe". Mosques, synagogues and cathedrals crowd the city.