This selection has the largest amount of images of all of the locations in the digital photos of this collection. The cities present in this order are Bad Staffelstein, Bamburg, Berlin, Colmar, Creglingen, Dachau, Eichstadt, Erfurt, Greifswald, Iphofen, Kelheim, Köln, Lubbeck, Meissen, Miltonberg, Nürnberg/Nuremberg, Prien, Rothenburg, Schleswig, Strasbourg, Traunstein, Volkach, Weimar, Würzburg, and a few photos from an unidentified origin. There are also 8 photo presentations. The first features Creglingen, Köln, Meissen, and Traunstein, the second features Erfurt and Weimar, the third features Prien and Versailles, the fourth features Würzburg, the fifth features Iphofen and St. Mary of the Vineyard, the sixth features Iphofen and is dated to 1995, the seventh features Rothenburg and is dated to 1995, and the last features Lubbeck, Griefswald, and Schleswig and is dated to 1995. These presentations seem to be composed of the other images in this collection.

These photos were taken during O'Brien's travels and thus are mostly made up of features of the cities that she found noteworthy, as well as sites of particular anthropological interest. Some of the photos are specifically dated to 1987, 1988, 1994, and 1995, though there were plenty of images taken at an unidentified time. These photo feature buildings (especially churches and historical structures), streets, statues, fountains, artifacts, art, Oktoberfest, and wide shots of landscapes and cities.

This selection features Alba, Brescia, Florence, Herculaneum (in Naples), Lecce, Milan, Ravenna, Rome (including Vatican City), Sicily (especially Palermo, Syracuse, Taormina, and Vallei de Templi), Taranto, Uffizi, Venice (from 1976 in particular), and a few photos from an unidentified origin. These photos were taken during O'Brien's travels and thus are mostly made up of features of the cities that she found noteworthy, as well as sites of particular anthropological interest. There are images of buildings (especially churches, museums, and government buildings), Greek and Roman ruins, statues, artifacts, and landscapes.

This selection features images from Cardiff, Ilston, and Rhossili. These photos were taken during O'Brien's travels and thus are mostly made up of features of the cities that she found noteworthy. The images include pictures of Park Le Bruce Burial Chamber, Cardiff Castle, St. Mary's Church (in Rhossili), and landscape images from near the shoreline.

This subseries is composed of photographs from Mexico and the United States of America. Important locations in this subseries are Copper Canyon (from 2008), Mexico City, and Oaxaca in Mexico and the Midwest region of the U.S. The photos feature buildings (especially churches), landscapes, streets, pottery, and notable anthropological, archeological, and geological sites.

This selection includes photos of the Midwest region, especially Colorado. There are images of geological features (including maps of these features) that reach as far east as Montana, as far east as Iowa, as far north as North Dakota, as far south as Arkansas. There are maps of the Penoke figure called Stone Man, Old Man Mountain in Colorado, the Missouri river system, and a topographical map of Colorado.

These photos were taken during Pat O'Brien's travels to Europe, North America, and South America and thus are mostly made up of features of the cities that she found noteworthy, as well as sites of particular anthropological or archeological interest. The majority of the images were taken in Europe, especially Germany and Italy. There are also a significant number of photos of England and France. Some of these images were compiled into photo presentations, which are also represented in this series, along with the photographs.

The photos feature buildings (especially churches, historical structures, and museums), streets, statues, fountains, graves, pottery, art, artifacts, ruins, waterfronts, tourist locations, festivals, wide shots of cities, landscapes, and sites of anthropological, archeological, and geological interest.

This subseries, which is easily the largest of the digital photo subseries, is composed of photos from Pat O'Brien's travels in Austria, Belgium, Croatia, Denmark, England, France, Germany, Italy, Malta, the Netherlands, Norway, Spain, Sweden, and Wales. There are also some photos whose locations have not been positively identified, but they appear to have been taken in one of the aforementioned countries. The years listed on some of the photos are 1976, 1987, 1988, 1994, 1995, 1999, and 2007. There are photos of streets, buildings (especially churches, museums, and government buildings), statues, graves, art and artifacts, ruins, waterfronts, wide shots of cities, landscapes, and sites of anthropological, archeological, and geological interest.

Box eleven contains photographs related to various research topics with corresponding materials and paperwork in other series. Topics include sacred sites and hot springs research (South Dakota, Nebraska, Wyoming, and Montana), Washington Marlatt homestead, the razing of the Kansas Artificial Breeding Service buildings, miscellaneous postcards, and a Yucatan photo booklet.

Box 18E includes slides of Etruscan, Mycenaean, and early Greek art, as well as slides of art and architecture of Ancient Crete. Box 18E also includes slides related to the Travel & Archaeology series (New Mexico and Texas slides). Box 18F includes slides from various locations in Mexico.

Also included in this series are slides related to research on hot springs, birds and animals, and Native American sacred sites (animal lodges, etc). Specific locations of these sites include South Dakota, Nebraska, Kansas, Oklahoma, Minnesota, Wyoming, and Montana.

Slide set thirteen contains photos of sites in Europe. Countries include France, Austria, Sweden, Norway, Denmark, and Germany. Set fourteen is a continuation of European slides. All boxes in set fourteen contain Germany photos. Set fifteen includes photos from Italy, Malta, England, Belgium, the Netherlands, Switzerland, Croatia, and Ireland. Set sixteen (boxes C - F) and set seventeen (boxes A & B) pertain specifically to European archaeology.