Delaware

Admission is free to see more than 30 aircraft, including cargo haulers, fighters, helicopters and a bomber, at the Air Mobility Command Museum, which is dedicated to military airlift and air refueling history.

See NASCAR and other car races at the speedway, nicknamed the “Monster Mile” because it’s the fastest one-mile (1.6 km) oval racetrack.

On 95 hectares near the banks of the Brandywine River, see restored gunpowder mills, the community where workers lived, and the home and gardens of the Du Pont family.

By day and night, stroll the busy 1.6-kilometer beach boardwalk and its collection of shops, restaurants, arcade games and amusement rides. Listen to musicians at the bandstand gazebo.

On Pea Patch Island, costumed interpreters bring US Civil War history to life at the 1859 Union fortress that once housed Confederate prisoners. While there, see wading birds nesting.

See a 77-room mansion, French gardens, reflecting pool and collection of vintage vehicles in a chauffer’s garage at the 121-hectare estate once owned by Alfred du Pont.

Swim, surf, fish and sun at the oceanfront park, which includes trails, the Fort Miles Historical Area with a World War II observation tower, and fish tanks and other exhibits at the nature center.

See the northernmost stand of bald cypress trees in the USA in the freshwater wetlands, and Hike the 7.8-kilometer Boundary Trail past the 35-hectare pond that’s great for kayaking and fishing.

With the Atlantic Ocean on one side and two bays on the other, this 1,140-hectare barrier island park is perfect for surfing, fishing, paddleboarding and swimming. Rent a cottage and stay overnight.

Learn about the Du Pont family and how they lived at their former estate, which has a 24-hectare garden and 175 antique-filled rooms. International scholars visit the research library.