Walnut Hill Reservoir.

Constructed in 1882, the Walnut Hill Reservoir was an integral part of Omaha's early water infrastructure, drawing water from the Missouri River and later the Florence Water Works. The reservoir boasts three basins with a combined capacity of 22 million gallons, a testament to the growing city's water needs at the time.

Though decommissioned, the reservoir remains a prominent feature of the landscape. MUD is currently working to try and get a government grant of $4 million dollars to remove the reservoir and flatten the hill while keeping the pump house and stairs. And the fountain and park down below will remain.

The money would go toward preparing the area potentially as a larger park, or for some sort of development. Here are some aerial maps and photos of the reservoir.