Kavalur is a village in the Vaniyambadi taluk of Vellore district. It is located in Jawadhu Hills. Its well known place for tourism and Vainu Bappu Observatory. Manali Kallat Vainu Bappu was an Indian astronomer and president of the International Astronomical Union. Bappu helped establish several astronomical institutions in India, including the Vainu Bappu Observatory named after him and also contributed to the establishment of the modern Indian Institute of Astrophysics. In 1957, he discovered the Wilson-Bappu effect jointly with American astronomer Olin Chaddock Wilson. The Vainu Bappu Observatory (VBO) established in 1970s, is an astronomical observatory owned and operated by Indian Institute of Astrophysics. VBO hosts the 1m Carl Zeiss Telescope, and the 2.3 m Vainu Bappu telescope. The cancellation depicts Vainu Bappu observatory.