Alan Cressler:
A 1,000 Foot High Dust Devil, Mauna Kea, near Summit, Hawaii County, Hawaii, Andy Porter 2
Alan Cressler:
A Group of Cavers About to Enter Grassy Cove Saltpeter Cave, Cumberland County, Tennessee 1
Alan Cressler:
Actun Tunichil Muknal, Cayo District, Belize, Central America 1
Alan Cressler:
Actun Uayzba Cab, Negative Impression, Prehistoric Hand Prints, Belize, Central America 1
Alan Cressler:
Adiantum capilllus-veneris, Rock Island State Park, Warren County, Tennessee 1
Alan Cressler:
Agkistrodon contortrix mokasen, Falling Cave, Jackson County, Alabama 1
Alan Cressler:
Alabama-Georgia Cave, DeKalb County, Alabama, Nancy Aulenbach 1
Alan Cressler:
Alan Cressler, Death Valley National Park, Badwater, Inyo County, California 1
Alan Cressler:
Alan Cresslers Badly Damaged Knee, Sepalau, Guatemala 1
Alan Cressler:
Amanita muscaria, Canaan Mountain, Tucker County, West Virginia 1
Alan Cressler:
American Falls, Niagara River, Niagara Falls State Park, Niagara County, New York, and Horseshoe Falls, Ontario, Canada 1
Alan Cressler:
Anthodite, Sphinx Cave, Coronado National Forest, Cochise County, Arizona 1
Alan Cressler:
Arch Cave, Selma Plateau, Oman, Stephen Alvarez and Louise Hose 1
Alan Cressler:
Asplenium Xcurtisii, Battle Slough, Sumter County, Florida 1
Alan Cressler:
Asplenium monanthes, Jackson County, Alabama 1
Alan Cressler:
Asplenium palmeri, Sycamore Canyon, Pajarita Wilderness, Coronado National Forest, Santa Cruz County, Arizona 1
Alan Cressler:
Asplenium scolopendrium var. americanum, Jackson County, Alabama 2
Alan Cressler:
Astropecten articulatus, Cumberland Island National Seashore, Camden County, Georgia 1
Alan Cressler:
Baxter Peak, Mount Katahdin, Baxter State Park, Piscataquis County, Maine 1
Alan Cressler:
Baxter Peak, Mount Katahdin, Baxter State Park, Piscataquis County, Maine, Alan Cressler, Brent Aulenbach, John Stembel 1
Alan Cressler:
Bimah Sinkhole, Oman, Stephen Alvarez and Louise Hose 1
Alan Cressler:
Boundary Post Bench Mark, San Bernardino County, California, Alan Cressler 1
Alan Cressler:
Brent Aulenbach, Fantasy Island (Mountain Bike Trails), Tucson, Pima County, Arizona 1
Alan Cressler:
Brooksville Ridge Crystal Cave, Citrus County 5
Alan Cressler:
Brooksville Ridge Crystal Cave, Citrus County, Florida 1
Alan Cressler:
Brooksville Ridge Crystal Cave, Citrus County, Florida 2
Alan Cressler:
Brooksville Ridge Crystal Cave, Citrus County, Florida, Paul Aughey 1
Alan Cressler:
Brooksville Ridge Crystal Cave, Hernando County, Florida 1
Alan Cressler:
Brooksville Ridge Crystal Cave, Hernando County, Florida 3
Alan Cressler:
Brooksville Ridge Crystal Cave, Hernando County, Florida 4
