A branch drain accepting waste products delivered to it vertically, by gravity, from one or more similar but usually smaller fixtures, and conducting them horizontally to the primary disposal drain.
When the Minuteman III retires, the silos and launch facilities at Malmstrom Air Force Base in Montana, which oversees 150 nuclear ICBMs scattered across a 13,800 square miles, will have been buried for 70 years.
The Kandersteg International Scout Center KISC is located in the  Berner Oberland in Switzerland. It is a camp site founded by Baden Powell himself. A bit more than 1,000 Scouts could squeeze in; site neighbours from the UK, Netherlands, etc and staff even from Australia (18 year old girl).