1. Jantar Mantar is an astronomical observatory built by Maharaja Jai Singh II of Jaipur in 1724. Located in the heart of New Delhi, it is one of five similar instruments built by him in India. The observatory includes 13 architectural astronomy instruments that were used to observe astronomical positions and movements.
Some interesting facts include:
- The largest instrument is the Samrat Yantra, which stands at a height of 27 meters and is used to calculate the time of day with a high degree of accuracy.
- The observatory was used to make observations for the preparation of the Hindu calendar and to predict eclipses.
- In 2010, Jantar Mantar was declared a UNESCO World Heritage site.
2. The observatory is open every day from 9:00 am to 5:00 pm. The phone number for Jantar Mantar is +91 11 23365358.
3. Tickets for Jantar Mantar cost 100 Indian Rupees (about $1.50 USD) for Indian citizens and 500 Indian Rupees (about $7 USD) for foreigners. Children under 15 years of age are free.
Transportation to Jantar Mantar is easily accessible. The nearest metro station is Patel Chowk on the yellow line. It is also easily reachable by local taxi services or by walking from nearby areas.


