The state's coastline is characterized by sandy beaches, dunes, and salt marshes, particularly along the Atlantic coast. The interior is mostly gently rolling farmland, interspersed with forests and freshwater wetlands. The northern part of the state, near the border with Pennsylvania, features some gently sloping hills and valleys.
The state's rivers play a significant role in the landscape of Delaware. The Delaware River forms the state's eastern border, separating it from New Jersey. The Christina River flows through Wilmington, the state's largest city, and empties into the Delaware River. Other notable rivers include the Brandywine River, the Mispillion River, and the Nanticoke River.