Prospect Park was substantially complete in 1873, but with the financial panic of that year, Olmsted and Vaux stopped collaborating on the park's construction. Some of the originally envisioned facets of the park, such as an observation tower, a terraced restaurant, and a top-shaped Carriage Concourse, were not built. Olmsted and Vaux had also planned for a system of parkways to connect to Prospect Park, though only two were built: Ocean Parkway, running to Coney Island in the south, and Eastern Parkway, running to Crown Heights in the east. Overall, the city of Brooklyn spent more than $4 million to acquire the parkland, while the actual cost of construction amounted to more than $5 million.