11. There are several natural arches on its rocky coast, as well as challenging rock climbs. 12. The natural arch is large enough for a sailboat to cross underneath it with ease. 13. It includes a natural arch through which seawater passes. 14. There are many natural arches and sandstone cliffs that are excellent for rock climbing and rappeling. 15. A natural arch in Monument Valley, Arizona, was named " Swinnerton Arch " in his honor. 16. It is probably the world's tallest natural arch . 17. "' Es Pont�s "'is a natural arch in the southeastern part of the island of Mallorca. 18. Below these high walls are natural arches and rock shelters used by Native Americans and early settlers. 19. It is known for its distinctive natural arch , which at approximately tall is the tallest in Hawaii. 20. Hag's head also features a natural arch .
