Surajkund is an ancient reservoir of the 10th century located on Southern Delhi Ridge of Aravalli range in Faridabad city of Haryana state about 8 km from South Delhi. Surajkund is an artificial Kund built in the backdrop of the Aravalli hills with an amphitheatre shaped embankment constructed in semicircular form. It is said to have been built by the king Surajpal of the Tomara Rajputs in the 10th century. Tomar, a younger son of Anangpal Tomar – the Rajput ruler of Delhi, was a sun worshipper and he had therefore built a Sun temple on its western bank. Surajkund is known for its annual fair "Surajkund International Craft Mela", 2015 edition of this fair was visited by 1.2 million visitors including 160,000 foreigners with more than 20 countries participating in it.

Delhi Ridge, sometimes simply called The Ridge, is a ridge in the Northern Aravalli leopard wildlife corridor in the National Capital Territory of Delhi in India. It is a northern extension of the ancient Aravalli Range, some 1.5 billion years old. The ridge consists of quartzite rocks and extends from the southeast at Tughlaqabad, near the Bhatti mines, branching out in places and tapering off in the north near Wazirabad on the west bank of the river Yamuna, covering about 35 kilometres.