The USS Constitution - known as "Old Ironsides" - is the world's oldest commissioned warship still afloat. She saw action in America's Revolutionary War and the War of 1812. The ship brings history to life as it is being refurbished at Charlestown Navy Yard in Boston.
The Indiana Dunes National Lakeshore offers a chance to enjoy nature within view of one of America's biggest cities.
The mounds built by native people 1400-800 years ago were used for ceremonial purposes that remain a mystery.
Canoeing on the St. Croix River.
