Fomadobe
A long smooth slide, typically curved, with a balustrade or banister along one or both sides. Typically used in place of, or formed from a staircase.
"The stairs turn into sides."
"They grab the banister and manage to keep their footing and the other four slide down the fomadobe out of sight; because it's a curved fomadobe."
"They grab the banister and manage to keep their footing and the other four slide down the fomadobe out of sight; because it's a curved fomadobe."