You can see Eagles in the wild in Mason Neck State Park and Blackwater National Wildlife Refuge. (Ann Cameron Siegal/For The Washington Post)
In the wild:

Remember, there are no guarantees of seeing a bald eagle in the wild, but if you’re patient, you may be rewarded.

Mason Neck State Park, southern Fairfax County. The Great Marsh Trail, a 3 / 4-mile long walking path, ends in an overlook that has a mounted telescope for better viewing.

Blackwater National Wildlife Refuge, Cambridge, Maryland. This refuge has about 30 mating pairs, which often can be seen from the four-mile-long Wildlife Drive.

In captivity:

While you won't see them in elegant flight, you are guaranteed of seeing a bird up close at these locations.

National Zoo. Tioga, a male bald eagle, has a new home along the zoo’s American Trail.

Meadowside Nature Center, Rockville. Orion, another male, has lived at the center in Rock Creek Regional Park since 1998.

Salisbury Zoo, Salisbury, Maryland. Abe, yet another male bald eagle, calls this zoo home.