Effigy, Cairn And Stone Cross At 6Th Century St Colmba's Chapel, Glencolumbcille, Ireland
by Gareth McCormack
Eroded Sandstone Columns, East Pawnee Buttes., Pawnee National Grassland, Colorado, U.S.A.
by Curtis Martin
Eroded Sandstone Formation., Colorado National Monument, Colorado, U.S.A.
by Mark Newman
Eroded Sandstone Pinnacles And Fins, Arches NP, Utah, U.S.A.
by Gareth McCormack
Factory Butte Near Hanksville., Utah, U.S.A.
by Jim Wark
Foothills
by N Schweitzer
Granite Corestones Covered In Orange Lichen Flinders Chase NP, Kangaroo Island, Australia
by Ross Barnett
Great Wall Of China Rock Formation, Mungo NP, Australia
by Cheryl Conlon
Grotto Of Neptune Cave At Capo Caccia, Alghero, Sassari, Italy
by Wayne Walton
Half Dome Seen From Sentinel Bridge Over Merced River, Yosemite NP, U.S.A.
by John Elk III
Hiker Dwarfed By Balanced Rock, Arches NP, Utah, U.S.A.
by Gareth McCormack
Hiker Silhouetted Beneath Delicate Arch, Arches NP, Utah, U.S.A.
by Gareth McCormack
Honeycombed Network Of Tunnels Carved Into Volcanic Rock Of The Kale., Uchisar, Nevsehir, Turkey
by Diana Mayfield
Inside The Lu Di (Reed Flute) Caves., Guilin, Guangxi, China
by Keren Su
Interior Passage Of Santu Antine, Torralba, Italy
by Wayne Walton
Knockeen Dolmen Near Waterford City., Munster, Ireland
by Greg Gawlowski
Limestone Bluff At Archways, Near Mungana Chillagoe, Queensland, Australia
by Ross Barnett
Limestone Caves, Coves D'Arta, Mallorca, Balearic Islands, Spain
by Jon Davison
Limestone Formation In Lake Cave, Margaret River, Australia
by Wayne Walton
