The central part of the hills is home to several large hollowed out trees one of which contains the Namika Ozz Shrine.
Alhough it is a fairly temperate area, White Chuchus can be encountered in Crenel Hills. A Blizzrobe, Meteo Wizzrobe, and Thunder Wizzrobe also appear here. A Blue Bokoblin wielding a Meteor Rod can be found in the foothills near the path leading to Orsedd Bridge.
Many locations in Breath of the Wild are named after characters or locations from previous games. As such, Crenel Hills may be named after Crenel Hermit and Mount Crenel from The Legend of Zelda: The Minish Cap.
It is possible that Crenel Hills was originally Mount Crenel in the past, but was eventually transformed into a hillside through time, erosion, and geologic activity.