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 narrow pavements and neoclassical buildings of Ladadika host plenty of bars, restaurants, cafes and cute boutiques. The area from Salaminos street to YMCA Park is known as Ladadika Quarter. This is an old quarter that starts at the waterfront and goes a few blocks inland up to Tsimiski Avenue that is busy with international and local brand shops. The northwestern part of the area, closer to the First Pier, is a bit more subdued, with less mainstream bars and fewer shops available. As you go southwest, the area becomes more and more lively, and finally brings you to the iconic White Tower.

The Ketchum Sun Valley Historical Society has been expanding its collection of historical artifacts since the mid-1990s. At the Wood River Museum, you can learn about the evolution of ski culture in the region from its beginnings and learn about the life of Ernest Hemingway, who found his final home along the Big Wood River in the Sun Valley.

Unique in Greece, the Rotunda is a cylindrical building from the early 4th century AD. The mosaics inside are really impressive. The Rotunda is a massive circular structure, built in 306 AD, with a masonry core. Through its long history, it has gone through multiple periods of use and modification as a polytheist temple, a Christian basilica, a Muslim mosque, and a Christian church once again. A minaret is preserved from its use as a mosque, and ancient remains are exposed on its southern side. Some Greek publications claim it is the oldest Christian church in the world. These days, the Rotunda is primarily an archaeological site, where you can see some remaining Christian mosaics and feel the weight of history.