However, unlike in other parts of the world, the mystery around the object did not last long as it was disclosed that a private company has installed it.
The triangular prism-shaped structure, around seven feet tall, became a hit among city dwellers after it was spotted in a garden on SG Highway on Thursday morning.
The garden is jointly managed by the Ahmedabad Municipal Corporation and Symphony Ltd. Situated near Gurudwara in Thaltej area, it was one of the attractions inaugurated by Chief Minister Vijay Rupani recently.
"The monolith has been placed there by the Symphony Ltd which takes care of the garden. The structure has been installed by the company for the visitors. People can see their reflection on the shiny surfaces of the structure and take selfies too," said Director, AMC's Garden Department, Jignesh Patel.
The first such three-sided steel monolith appeared and disappeared after a few days in a remote desert of Utah, United States. Later, similar structures were spotted in around 30 countries.