| Costello, Ali - |
| The Secluded Villages of Zagori, Greece (15) | | Multiple Choice | 2011.04.21 |
| The Secret Gorges of Verdon, France (8) | | Multiple Choice | 2011.11.22 |
| The Secret Gorges of Vintgar, Slovenia (9) | | Multiple Choice | 2011.02.22 |
| The Secret Pools of Kuang Si Falls, Laos (9) | | Multiple Choice | 2011.03.06 |
| The Shadowy Valleys of Meteora’s Less-Traveled Peaks, Greece (8) | | Multiple Choice | 2011.09.28 |
| The Silent Town of Civita di Bagnoregio, Italy (8) | | Multiple Choice | 2011.06.12 |
| The Snow-Covered Peaks of Spiti Valley, India (17) | | Multiple Choice | 2011.11.09 |
| The Sunken Forest of Lake Kaindy, Kazakhstan (8) | | Multiple Choice | 2011.06.26 |
| The Uncharted Valleys of Garhwal Himalayas, India (10) | | Multiple Choice | 2011.09.04 |
| The Underground Churches of Lalibela, Ethiopia (8) | | Multiple Choice | 2011.12.07 |
| The Underground River of Puerto Princesa, Philippines (9) | | Multiple Choice | 2011.12.08 |
| The Undiscovered Atolls of Tuvalu (37) | | Multiple Choice | 2011.10.26 |
| The Undiscovered Islands of Raja Ampat, Indonesia (9) | | Multiple Choice | 2011.12.21 |
| The Unexplored Canyons of San Rafael Swell, USA (9) | | Multiple Choice | 2011.01.25 |
| The Untamed Wilderness of Tasmania’s Tarkine Rainforest (8) | | Multiple Choice | 2011.09.15 |
| The Untouched Coral Gardens of Tubbataha Reef, Philippines (19) | | Multiple Choice | 2011.05.06 |
| The Untouched Shores of Berlengas Archipelago, Portugal (14) | | Multiple Choice | 2011.11.23 |
| The Valley of the Moon in Wadi Rum, Jordan (18) | | Multiple Choice | 2011.06.13 |
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