Allegheny Landing

They call Pittsburgh the 'city of rivers,' so it's only appropriate that it has a park from which to admire its internal waterways. Allegheny Landing was one of the first urban riverfront sculpture parks in the country, and while it can get a little littered, the modern sculpture plus waterfront biking and walking trails make for an altogether lovely slice of city green space. It's pleasant in spring and autumn, and dramatic in winter snow.