Researchers have determined that the Crowley lake columns were created by cold water percolating down into — and steam rising up out of — hot volcanic ash spewed by a cataclysmic explosion 760,000 ...

Stone columns represent a pivotal ground improvement technique aimed at enhancing the load‐bearing capacity and reducing settlement in soft soil conditions. Traditionally, this method involves the ...

The strange, pillarlike formation emerged after the Crowley Lake reservoir was completed in 1941: stone columns, up to 20 feet tall, connected by high arches, as if part of an ancient Moorish temple.

Nick Squires is The Telegraph’s Rome correspondent, covering Italy, the Vatican, Greece and the Balkans. He has reported for the paper since 2000, having previously covered Australia, New Zealand and ...