11.   Zork was a classic adventure in the underground caves that nearly every computer owner knew started outside a small, white, boarded-up house.

12.   As U.S. forces sweep through the area, they have found a large network of buildings, bunkers and a warren of underground caves, Myers said.

13.   But the defense secretary said the targets in that case were underground caves suspected of being used to store weapons.

14.   Construction workers stumbled upon an underground cave with more than a dozen prehistoric paintings of bison and other animals, news reports said Friday.

15.   The boring machine has been running into very soft earth, wells, sinkholes and underground caves as it moves under Panepistimiou.

16.   The Soviets turned its extensive underground caves and spectacular gold-domed churches into a museum.

17.   The TBM has been running into very soft earth, wells, sinkholes and underground caves as it moves under Panepistimiou from Omonia to Constitution Square.

18.   Worshippers approach the shrine by climbing a wooded hill, then descend stone stairs to the underground cave.

19.   A British potholer stuck in underground caves for more than two days in southeast France was found dead on Wednesday, rescuers said.

20.   The treasure hunters have been digging into underground caves for the precious stones.