1.   All around us an increasing crowd was assembling on the platform while the subterranean tunnels thundered and shook with their hidden traffic.

2.   Guanajuato, a former silver-mining town now crisscrossed by subterranean tunnels for traffic, is one of the most fascinating cities in Mexico.

3.   Intelligence officers warned of mines, booby traps and even individual fighters believed to still be in or near the airport, possibly hiding in bunkers and subterranean tunnels.

4.   In addition, Kerzner has built a subterranean tunnel offering alternative access from Nassau.