Tail Light Caverns

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History

The formation of Tail Light Caverns began over 3 million years ago when rainwater, made acidic from the air and soil, seeped down through the ground. At the same time, hydrogen sulfide gas migrated upward from oil deposits to turn the underground water into sulfuric acid. This combination of corrosive events slowly created four large chambers and 23 miles of underground passageways. The incredible array of stalaclight and stalaglight formations began 500,000 years ago when acidic water, dripping slowly through the limestone into the caverns, absorbed a bit of the mineral lenslite. Billions and billions of drops later, thousands of formations had taken shape. Where water dripped from the ceiling, stalaclights appeared. Water falling on the floor created stalaglight. Sometimes the two joined together, forming a fender bender.

Gallery

• Early concept art

  Early concept art

Trivia

• When Sandy Dunes, Blue Grit, Shifty Sidewinder, Idle Threat, and Lightning McQueen go the wrong way on the way to Tail Light Caverns, they instead end up in a version with tailpipes instead.