Onondaga Creek
The settlement that became Syracuse arose in a forested swampy area at the creek outlet in the early 1800s as a result of the state of NY constructing the Erie Canal and developing salt production on the shores of Onondaga Lake. From this time forward, the natural meandering flood plain of the creek was periodically channelized and straightened to facilitate uncontrolled development of the creek-side and flood plain upstream towards the Onondaga Nation Reservation. A "progress"-based economic cycle involved land developers purchasing farmland and building in the adjacent rural towns, followed by flooding, sewage, water supply, and school crises. The city of Syracuse would then respond to petitions by the new homeowners and businesses to formally ask the state legislature to annex these lands. By the turn of the twentieth century, this cycle accelerated due to the city acquiring water rights to Skaneatles lake, and the development of street car lines.
Siege of Syracuse (397 BC)
The original city of Syracuse stood on the island Ortyga with some structures around the Agora in the mainland before the Sicilian Expedition in 415 BC, when walls were built around the Tycha and Archadina areas. After Dionysius finished adding to the existing structures, Syracuse possessed walls with the greatest circuit in the Greek world.