- Western State Hospital is located on the site of historic Fort Steilacoom, which served as a military post from 1849 to 1868 until the federal government abandoned it. The Washington territory purchased the fort with the intent of turning it into a hospital for people who suffered from mental illness. The hospital, then called the Insane Asylum of Washington Territory, opened in 1871 with 15 male and six female patients.
- Mill Creek (Walla Walla River tributary) (Wikipedia)
Mill Creek is a 36.5-mile-long (58.7 km) tributary of the Walla Walla River, flowing through southeast Washington and northeast Oregon in the United States. It drains from the western side of the Blue Mountains into the Walla Walla Valley and flows through the city of Walla Walla, which draws most of its water supply from the creek. The creek is named for the sawmill built in 1845 by Marcus Whitman, one of the first European settlers in the valley.