Alaska Maritime National Wildlife Refuge – the nation's largest refuge is home to 80% of Alaska's seabirds.

Cabrillo National Monument – honors the first European to explore the West Coast of the United States.

Dry Tortugas National Park – site of Ft. Jefferson where which famous Civil War figure was imprisoned?

Fire Island National Seashore – its lighthouse has served as a beacon to travelers since 1858.

Lewis and Clark National Wildlife Refuge – see the Columbia River estuary as Lewis and Clark saw it in 1805.

Pelican Island National Wildlife Refuge – a single man's action led to the creation of the first National Wildlife Refuge in 1903.

Salt River Bay National Historic Park and Ecological Reserve – site of the first fatal skirmish between Columbus and native people of the Caribbean.

San Juan Island National Historic Park – did you know a pig nearly set off a war with Canada?

U-1105 Black Panther Historic Shipwreck Preserve – an experimental German WWII submarine is towed to the U.S. for study, then sunk.

Virgin Islands Coral Reef National Monument – famous for its prehistoric rock art, along with white sand beaches and coral reefs.