This easy trail in Kaosiung's Alian District is full of interesting details. There's a twisty slot canyon, a temple in a cave, and one of Taiwan's 100 Minor Peaks.
TEMPLE IN A CAVE
TAIPEI SKYLINE TRAIL SECTION 4 (Short Version)
The highlight of this section of the Taipei Skyline Trail is unquestionably the exceedingly cool temple cave close to Mount Hongdan. That aside, it involves some pleasant wandering over less-travelled paths, and passes plenty of historic spots.
Taiwan Trails and Tales 