The Big Hole is a huge open-pit mine in Kimberley, South Africa and claimed to be the largest hole excavated by hand. From 1866 to 1914 50,000 miners dug the hole with picks and shovels, yielding 2,722 kg of diamonds. The Big Hole has a surface of 17 hectares (42 acres) and is 463 metres wide. It was excavated to a depth of 240 m but then partially infilled with debris reducing its depth to about 215 m; since then it has accumulated water to a depth of 40 m leaving 175 m visible. The underground Kimberly Mine was mined to a depth of 1097 metres.
Kimberley Giant man made hole, South Africa.
Shobhit Kumar Prabhakar
Shobhit Kumar Prabhakar, known online as GeekLord, is a software developer and the founder of Cyber Mitra Solutions in Lucknow, India. He has worked on websites, applications, and data systems since 2005, with experience spanning more than 800 web projects and over 600 survey instruments. His work includes custom WordPress themes and plugins, web applications, e-commerce, and multilingual field surveys built with ODK, SurveyCTO, KoboToolbox, and XLSForm. Survey projects involve skip logic, repeat groups, randomisation, validation, multimedia, and offline data collection. He also works on data cleaning, analytics, reporting, APIs, Linux and cloud deployments, and AI tools and automation using PHP, Python, and JavaScript. He holds a B.Tech in Information Technology from Uttar Pradesh Technical University and a diploma in Electrical Engineering from Hewett Polytechnic, Lucknow. On GeekLord.com, he shares practical guides, code, troubleshooting notes, and experiments in programming, web development, AI, and useful software, alongside photography and personal writing. His fuller background and project examples are on the About Shobhit page and shobhit.net.

