In 1982, after receiving a Guggenheim Fellowship, Bridges flew in a small single-engine Cessna from New York to the Yucatán, where she photographed ancient Mayan sites, some still partially overgrown by the dense jungle. Many of these photographs appeared in her 1986 book "Markings: Aerial Views of Sacred Landscapes", which also includes photographs of Nazca, Native American archaeological sites, and megalithic monuments in Britain and Brittany. Bridges returned to Peru on a Fulbright Scholarship and published many of the resulting photographs in her 1991 book "Planet Peru: An Aerial Journey Through a Timeless Land". In Egypt in 1993-94 she obtained unusual permission to fly over the Valley of the Kings and along the Nile. Leaning out of an old Russian military helicopter, she photographed dozens of ancient sites. The result was a unique collection of aerial photographs in her 1996 book "Egypt: Antiquities from Above". Closer to home Bridges photographed ancient and contemporary sites across the United States, from Pre-Columbian mounds in the Midwest and geoglyphs in California, to lava flows in Hawaii and glaciers in Alaska. Many of these photographs are in her 1997 book "This Land is Your Land: Across America by Air". Bridges also received a grant from the French government to make aerial photographs of historical and contemporary sites in the Calais region to document the changing environment in connection with the Channel Tunnel, as seen in her 1995 book "Vue d’Oiseau". She received a similar grant from the Belgian government to document the landscape of Wallonia from the air, resulting in the 1999 book "Vol au-dessus de la Wallonie". Both collections of photographs appeared in solo exhibitions in major museums throughout Europe. She has also photographed the ruins of classical cities and temples in Greece and Turkey. In 2009, she flew over Minoan sites in Crete, and the Onassis Foundation exhibited these photographs in New York City.