a fragment of the world's largest ancient sundial samrat yantra.

landmark architecture sky tourism fragment largest ancient sundial samrat yantra world's curved marble measuring surfaces high staircase gazebo dome top blue jantar mantar observatory astrology india sundial time observatory yantra jaipur measure curve largest pavilion copy space wandering stairway brihat steps unique astrological sun dial scale measurement observation extraordinary stairs large staircase gazebo dome sandstone calculation mantar geometric shapes astronomical heritage marble astronomy jantar sky instrument famous indian unesco blue historic ancient landmark old