Doi Suthep bells

These bells hang on the rails of the enclosed walkway for devotional rounds at the base of the chedi at Wat Phrathat, Doi Suthep.  There are bigger, even humungous bells on the outer terraces of the temple.
Chedi Facts
Thai temples were originally  built around the chedi or stupa, which usually contain important relics.
According to legend when a relic was bought to Chiang Mai to be enshrined at a temple in1371, it split in two. The second piece was placed on an elephant, which roamed around for 3 days, climbing Doi Suthep.  When it reached the promontory, it circled three times and then dropped dead. It was decided the relic and the remains of the poor elephant would be stay there and a 7 m chedi was built. It was redesigned in 1525 and the chedi is now more than 15m high.