Ireland, County Clare, Cliffs of Moher with O'Briens Tower.

Ireland, County Mayo, Erris Head, Erris Head Loop Walk, view of cliffs and sea.

USA, Utah, Moab, Base jumpers prepare to jump from the Mothership Spacenet suspended from the cliffs 950 vertical feet above the valley floor at Mineral canyon. Another jumper rides the zipline from...

USA, Utah, Moab, A base jumper drops from the Mothership Space Net suspended from the cliffs 950 vertical feet above the valley floor at Mineral Canyon.

USA, Utah, Moab, Base jumpers prepare to jump from the Mothership Spacenet suspended from the cliffs 950 vertical feet above the valley floor at Mineral Canyon.

USA, Arizona, Monument Valley, A hot air balloon flying by Spearhead Mesa during Balloon Festival in the Navajo Tribal Park.

USA, Arizona, Monument Valley, Hot air balloon flying by Merrick Butte during Balloon Festival in the Navajo Tribal Park.

USA, Arizona, Monument Valley, Hot air balloon flying by Merrick Butte during Balloon Festival in the Navajo Tribal Park.

USA, Arizona, Monument Valley, Hot air balloons during Balloon Festival in the Navajo Tribal Park. In the forground at left is the Thumb.

USA, Arizona, Monument Valley, A hot air balloon flying over the red sand dunes at Sand Springs during Balloon Festival in the Navajo Tribal Park.

USA, Arizona, Monument Valley, Three hot air balloons during Balloon Festival in the Navajo Tribal Park. The Three Sisters are at right.

USA, Arizona, Monument Valley, Two hot air balloons fly during Valley Balloon Festival in the Navajo Tribal Park.