
Padre Island National Seashore —
With 70 miles of protected coastline, Padre Island in Texas is the longest undeveloped barrier island in the world. The island is favored nesting ground for the endangered Kemp's ridley sea turtle and is inhabited by more than 380 species of birds.

Padre Island National Seashore —
The Sea Turtle Science and Recovery Program at Padre Island is committed to preserving and restoring populations of endangered sea turtles.

Mammoth Cave National Park —
Mammoth Cave National Park in Kentucky was established in 1941 and hosts a variety of interconnected ecosystems.

Mammoth Cave National Park —
Mammoth Cave is the world's longest known cave system. With complex labyrinths and more than 390 miles excavated, it's safe to say that "Mammoth" makes for a fitting name.

Congaree National Park —
Congaree National Park in South Carolina is the largest expanse of bottomland hardwood forest that remains in the Southeastern United States.

Congaree National Park —
Bird-watching is a popular activity in Congaree National Park, especially during migration seasons.

Isle Royale National Park —
The Rock Harbor Lighthouse sits in Isle Royale National Park in Michigan. Surrounded by Lake Superior, Isle Royale provides a tranquil getaway.

Isle Royale National Park —
Isle Royale offers scuba diving opportunities, where you can explore sunken vessels protected by the National Park Service.

Biscayne National Park —
Biscayne National Park protects beautiful coral reefs, where visitors can scuba dive or snorkel to get a sight of an underwater wonderland.

Biscayne National Park —
Built by Mark Honeywell in the 1930s, the Boca Chita Lighthouse symbolizes Biscayne National Park. The lighthouse is open intermittently, and the deck provides a fantastic view of the ocean.

Virgin Islands National Park —
There are more than 500 different species of fish associated with the Virgin Islands. French grunts are among one of many reef fish that can be seen.

Virgin Islands National Park —
The green turtle, shown here, and the hawksbill turtle are among the most commonly spotted sea turtles in the waters around the Virgin Islands.

Canyon De Chelly —
Visitors to Canyon De Chelly in Arizona can get a view of Massacre Cave at the Massacre Cave Overlook on the north rim drive of the park.

Canyon De Chelly —
Hikers can take the White House Ruin Trail and enjoy scenic views.



