This document lists and ranks the 11 most expensive catastrophes in history by cost, ranging from the Titanic at $150 million to the 2008 US Presidential Election which cost $800 billion in the first two months. Some of the other costly disasters mentioned include the Exxon Valdez oil spill at $2.5 billion, the Challenger space shuttle explosion at $5.5 billion, and Chernobyl nuclear disaster estimated at $200 billion.