11. The game of Adventure is no substitute for actual spelunking , he reminds us. 12. But the mountains of Pennsylvania feel as familiar as spelunking to many New Yorkers. 13. The area is known for its spelunking caves. 14. They met Ali on a cave for a horse ride on a hill and spelunking . 15. His cave kingdom in " World Beneath " evolved after spelunking in Puerto Rico. 16. This is the best-known cave system in Mexico, and the most popular for spelunking . 17. Activities within the park include hiking, spelunking , fishing, swimming, and other water activities. 18. Nolan eventually introduces Cissy to spelunking and falls madly in love with Dede, who scorns his advances. 19. He compares the work to spelunking , since the movement is downwards, not upwards as in climbing. 20. For just $ 6, the trip combines roughly three hours of kayaking on the Nam Song and spelunking .
