"For centuries, the Oneida Carrying Place, a six mile portage connecting the Mohawk River and Wood Creek, served as a vital link for those traveling by water from the ocean to the Great Lakes. When Europeans arrived, nations fought for control of the carry, the homelands of the Six Nations Confederacy, and the rich resources of North America. In this struggle, Fort Stanwix would play a vital role."

"The battle at Fort Necessity in the summer of 1754 was the opening action of the French and Indian War. This war was a clash of British, French and American Indian cultures. It ended with the removal of French power from North America. The stage was set for the American Revolution."

"Originally established as a private fur trading fort in 1834, Fort Laramie evolved into the largest and best known military post on the Northern Plains before its abandonment in 1890. This 'grand old post' witnessed the entire sweeping saga of America’s western expansion and Indian resistance to encroachment on their territories."

"Throughout its history, the story of Fort Matanzas has been closely intertwined with that of the city of St. Augustine and the Castillo de San Marcos. This Spanish outpost fort was built in 1740-1742 to guard the Matanzas Inlet and to warn St. Augustine of British or other enemies approaching from the south. Fort Matanzas now serves as a reminder of the early Spanish empire in the New World.

According to the National Park Service, "In the northwest corner of Fort Vancouver's protective palisade wall, a three-story tower called a bastion or blockhouse rose above the surrounding plain. From the top, Hudson's Bay Company (HBC) employees could keep watch over the Columbia River valley and its gently rolling hills. The bastion was a common feature of HBC posts throughout North America.

"Only from an aerial view can the entire breadth of Fort Monroe [National Monument] be taken in all at once. Consisting of many significant examples of historic, cultural, and natural resources the almost 600 acres of Fort Monroe, VA has been a National Historic Landmark since 1960."

According to the National Park Service, "Fort Pulaski National Monument is located in Georgia and was added to the Network in 2019. Fort Pulaski National Monument was captured by US forces in the Spring of 1862, an event which served as the impetus for General David Hunter to issue a series of orders formally emancipating the enslaved people of coastal Georgia and South Carolina. The fort was later garrisoned by United States Colored Troops in 1866."

"F" is for "Fort" and all the forts and their history preserved as or within units of the National Park System.

According to the National Park Service, "In November 1805, the Corps of Discovery reached the Pacific Ocean. Having found 'the most practicable and navigable passage across the Continent of North America,' the mission was complete. Although eager to begin the journey home, members of the Corps knew that travel would have to wait until spring - more than one snowy mountain range stood in their path. The Corps would build a temporary home on the coast."

"About 1.2 million years ago, a spectacular volcanic eruption created a 13-mile-wide circular depression in the earth now known as Valles Caldera. The preserve is known for its huge mountain meadows, abundant wildlife, and meandering streams. The area also preserves the homeland of ancestral native peoples and embraces a rich ranching history."

"High ancient sea ledges, deep rocky canyons, flowering cactus, and desert wildlife—treasures above the ground in the Chihuahuan Desert. Hidden beneath the surface are more than 119 caves—formed when sulfuric acid dissolved limestone leaving behind caverns of all sizes."