As a monument, this takes some beating!
An annual swinging ceremony known as Triyampavai-Tripavai was held at Giant Swings of major cities until 1935, when it was abolished for safety reasons.
The Giant Swing was constructed in 1784 in front of the Devasathan shrine by King Rama I. During the reign of Rama II the swing ceremony was discontinued as the swing had become structurally damaged by lightning. In 1920 it was renovated and moved to its current location in order to make space for a gas plant. The ceremony was again performed until 1935, when it was discontinued after several fatal accidents.
According to an ancient Hindu epic, after Brahma created the world he sent Shiva to look after it. When Shiva descended to the earth, Naga serpents wrapped around the mountains in order to keep the earth in place. After Shiva found the earth solid, the Nagas moved to the seas in celebration. The Swing Ceremony was a re-enactment of this. The pillars of the Giant Swing represented the mountains, while the circular base of the swing represented the earth and the seas. In the ceremony Brahmins would swing, trying to grab a bag of coins placed on one of the pillars.
The ceremony was popularly known as Lo Jin Ja or Lo-Chin-Cha (“pulling the swing”).
It is known that Tamil verses from Thiruvempavai — poet Pratu Sivalai (“opening the portals of Shiva’s home”) — were recited at this ceremony, as well as the coronation ceremony of the Thai king.