In this connection, he studied rock arts in UK, Austria, France, Italy, Germany, Spain, Greece, Mexico, Egypt and USA.

With co-workers including Surendrakumar Arya, Daljit Kaur, Girish Chandra Sharma, Narayan Vyas, Giriraj, Kailash Pande, Pancholiji, Jitendradutta Tripathi, Bharati Shrotri, Dubey as well as U. N. Mishra, Lothar Banke, Irwin Mayer and Robert Brooks he did extensive research in the field of rock arts.

[citation needed] Beginning in 1954, Wakankar along with his students Sachida Nagdev, Muzaffar Qureshi, Rahim Guttiwala, explored the ravines of Chambal and Narmada rivers and carried out excavations at Maheshwar (1954), Navada Toli (1955), Manoti (1960), Awara (1960), Indragadh (1959), Kayatha (1966), Mandsaur(1974, 1976), Azadnagar(1974), Dangawada (1974, 1982), Verconium Roman site in England (1961) and Incoliev in France (1962), Runija (1980).

An expert in the field of numismatics and epigraphy Wakankar collected and studied about 5500 coins ranging from 5th Century B. C. onwards.

Jagannath Dubey, Murali Reddy, Narayan Bhatiji have contributed immensely to this Herculean task of collection and painstaking study.