Seaside Plantation

The Frogmore Plantation Complex, located on Saint Helena Island, in Beaufort County, South Carolina, is significant for several reasons. First, the plantation home, along with its contributing properties (i.e. pump house, barn, windmill/water tower), offers an excellent example of the area's architectural development from 1790 to 1920. Second, the plantation's long association with prominent families contributes to its significance. The plantation was first owned by Lieutenant Governor William Bull, who then willed it to his son in 1750. After the Civil War, the house was purchased by two northern missionaries — Miss Laura Matilda Towne and Miss Ellen Murray — who founded the historic Penn School, located within the Penn Center. The Frogmore Plantation Complex was listed in the National Historic Register on May 26, 1989.

Edgar Fripp Mausoleum, St. Helena Island Parish Church is a historic mausoleum in Frogmore, South Carolina, United States.The Egyptian Revival mausoleum was built in 1852 and added to the National Register of Historic Places in 1988.

St. Helena Parish Chapel of Ease Ruins is a historic site in Frogmore, South Carolina on Saint Helena Island. The Anglican chapel was constructed in 1740 by planters on Saint Helena Island as a chapel of ease for parishioners who had difficulty traveling to worship at the Parish Church of St. Helena in Beaufort, South Carolina. The ruins were added to the National Register of Historic Places in 1988.

St. Helena Island is a Sea Island in Beaufort County, South Carolina, United States. The island is connected to Beaufort by U.S. Highway 21. The island has a land area of about 64 sq mi (170 km2) and a population of 8,763 as of the 2010 census. It is included as part of the Hilton Head Island-Beaufort Micropolitan Area. The island is renowned for its rural Lowcountry character and being a major center of African-American Gullah culture and language. It is considered to be the geographic influence behind the children's television program Gullah Gullah Island.

The Penn Center, formerly the Penn School, is an African-American cultural and educational center in the Corners Community, on Saint Helena Island. Founded in 1862 by Quaker and Unitarian missionaries from Pennsylvania, it was the first school founded in the Southern United States specifically for the education of African-Americans. It provided critical educational facilities to Gullah slaves freed after plantation owners fled the island, and continues to fulfill an educational mission. Leigh Richmond Miner photographed students and activities at the school.The campus was designated a National Historic Landmark District in 1974. Darrah Hall and Brick Baptist Church on the campus were declared part of Reconstruction Era National Monument in January 2017. In spring of 2019, it became the Reconstruction Era National Historic Park, along with Fort Sumter.

Orange Grove Plantation is a historic plantation house and national historic district located on Saint Helena Island near Frogmore, Beaufort County, South Carolina. The district encompasses one contributing building and two contributing sites, and reflects the early-20th century influx of Northerners onto St. Helena Island. The plantation was first recorded in 1753 when Peter Perry purchased 473 acres. Perry owned 46 chattel slaves. The plantation house, built about 1800, was in poor condition when Henry L. Bowles (1866-1932), a U.S. Representative from Massachusetts, bought the property in 1928. He demolished it and built the present house in the same year. The property also includes the tabby ruin of the kitchen, built about 1800, and a tabby-walled cemetery containing three early-19th century graves of the Fripp and Perry families.It was listed in the National Register of Historic Places in 1989.

Knights of Wise Men Lodge is a historic clubhouse located on Saint Helena Island near Frogmore, Beaufort County, South Carolina. It was built about 1942, and is a simple, two-story, rectangular cinder block building with a gabled roof. It features a symmetrical, elaborate stepped façade. It was designed by the Lodge brothers and built by local masons, and is located at the rear of The Green. On holidays, the hall was used both as a dance hall and a jail.It was listed in the National Register of Historic Places in 1996.

The Green is a historic open-space located on Saint Helena Island near Frogmore, Beaufort County, South Carolina. It is the site of community meetings, celebrations, and other gatherings. The Green was the site of the first Darrah Hall, an auditorium and community center built about 1885 by Penn School, and destroyed in 1893. Since that time the Green has continued to serve as a gathering place for the people of St. Helena Island. At the rear of The Green is the Knights of Wise Men Lodge. It was listed in the National Register of Historic Places in 1988.

The Corner Store and Office, also known as the Frogmore Emporium, Macdonald, Wilkins, and Company Store and Mark D. Batchelder Office, is a historic general store, residence and, eventually, office building located on Saint Helena Island near Frogmore, Beaufort County, South Carolina. Primarily built as a house, it was built about 1877, and is a two-story, wood-frame building with a gable roof. It features a two-story wraparound porch. The adjacent one-story house was built about 1905. The store sold provisions to the islanders, most of whom were African American, and became one of the major centers of commercial and social activity on St. Helena. The home and businesses in the building were owned by Cameron Thomas and his relatives for most of the 20th century. The family lived in the back and upstairs portion of the house, while the front included a general store and liquor store, with the small house added on used as a residence for relatives. The store also had the only gas pump on the island for many years. It was listed in the National Register of Historic Places in 1988.

The Corner Packing Shed, in Frogmore, South Carolina, is a historic packing house on St. Helena Island that was built in 1930. It was listed on the National Register of Historic Places in 1988.

Dr. York Bailey House, also known as the Sara Rhodan House, is a historic home located on Saint Helena Island near Frogmore, Beaufort County, South Carolina. It was built about 1915, and is a two-story, vernacular frame American Foursquare style dwelling. It was built for Dr. York W. Bailey (1881-1971), a prominent native of the island who was St. Helena's first African-American doctor and only resident physician for over 50 years. He lived in this house until his death in 1971. The York W. Bailey Cultural Center and Museum at Penn Community Center is named for him.The house was from a mail order catalogue.It was listed in the National Register of Historic Places in 1988.

Robert Simmons House, also known as the Willie Simmons House, is a historic home located on Saint Helena Island near Frogmore, Beaufort County, South Carolina. The original section was built about 1910 by farmer Robert Simmons, and subsequently expanded. It is a double pen house type on metal piers, with a full-width shed roof porch supported by wood posts. It is a rare example of a vernacular architectural form once common to St. Helena Island.It was listed in the National Register of Historic Places in 1988.