Question: In what Texas city can you visit a decommissioned underground reservoir that once stored 15 million gallons of drinking water?
Answer: Houston. The 87,500-square-foot cistern is 25 feet in height and supported by 221 concrete pillars. Built in 1926, it was decommissioned in 2007 after an irreparable leak was discovered. The space can be accessed from Buffalo Bayou Park or viewed from above through a periscope.
