The shelters prominently feature the tree trunk supports that can make use of wood/bamboo boards to enhance the natural feeling of the shelter. Timber or bamboo boards can be cladded onto the metal tree trunk support to add a natural touch. Sitting atop the tree trunk supports are rounded squares of tempered glass with below it, a smaller rounded square of metal plate with perforated pattern of the energy swirl. Shelters of different heights can be placed in a line so that the glass tops overlap each other to provide users with better protection from the sun and rain. The uneven height distribution from a group of shelters would resemble a wave, adding movement like the Current of Vitality.