The square is bordered by Amalia Avenue (Leofóros Amalías) to the east, Otto Street (Óthonos) to the south and King George I Street (Vasiléos Georgíou Prótou) to the north. The street bordering the square to the west, connecting Stadiou Street with Fillelinon Street, is simply named "Syntagma Square" (Plateia Syntágmatos). The eastern side of the square is higher than the western, and dominated by a set of marble steps leading to Amalias Avenue; beneath these lies the Syntagma metro station. The stairs emerge below between a pair of outdoor cafes, and are a popular city-centre gathering place. Syntagma also includes two green areas to the north and south, planted with shade trees, while in the centre of the square there is a large mid-19th century water fountain.
The Old Royal Palace neoclassical building, housing the Greek Parliament since 1934, is immediately across Amalias Avenue to the east, and surrounded by the extensive National Gardens, which are open to the public; the Parliament itself is not open to the public, even when not in session. Every hour, the changing of the guard ceremony, performed by the Presidential Guard, is conducted in front of the Tomb of the Unknown Soldier on the area between the Syntagma Square and Parliament building. On certain days, a ceremonial changing of the guard occurs with an army band and the majority of the 120 Evzones present at 11 am.