Päijälä hill fort is an Iron Age hill fort by the Lake Saaresjärvi in Kuhmoinen. The abundance of artefacts found at the Päijälä hill fort makes it nationally significant. The fort is thought to have been used since at least the 12th century. Kuhmoinen was then a borderland between Häme and Carelian tribes who fought over the ownership of wilderness areas.
The fort hill rises 25 metres above the surrounding terrain, and looking from above you can see the fort is built in a roughly circular form. The slopes of the hill are extremely steep from three sides.
The ancient Argos Theater was built in 320 BC. and is located in Argos, Greece against Larissa Hill. Nearby from this site is Agora, Roman Odeon, and the Baths of Argos. The theater is one of the largest architectural developments in Greece and was renovated in ca 120 AD.
The Hellenistic theater at Argos is cut into the hillside of the Larisa, with 90 steps up a steep incline, forming a narrow rectilinear cavea. Among the largest theaters in Greece, it held about 20,000 spectators and is divided by two landings into three horizontal sections. Staircases further divide the cavea into four cunei, corresponding to the tribes of Argos A high wall was erected to prevent unauthorized access into the theatron and may have helped the acoustics, but it is said the sound quality is still very good today.
Around 120 CE, both theaters were renovated in the Roman style.