The richest man in India, Mukesh Ambani, built a home valued at US$1 billion. It’s a 27-story building with 3 helipads, a 6-floor car park, a staff of 600, a 4-storey hanging garden and a cinema.

When building the Golden Gate Bridge, the lead structural engineer insisted on the installation of a safety net at an exorbitant cost of US$130,000. It saved 19 workers.