Delaware Water Gap National Recreation Area, Penn./N.J.

Delaware Water Gap National Recreation Area is a beautiful part of the Appalachian Mountains with all kinds of outdoors recreation available.

This park preserves 40 miles of the middle Delaware River and almost 70,000 acres of land along the river’s New Jersey and Pennsylvania shores.

River-focused recreation is what draws nearly five million tourists to this Appalachian-ridge park on the border of New Jersey and Pennsylvania.

Lake Mead National Recreation Area, Ariz./Nev.

Thirty miles southeast of Las Vegas lies the U.S.’s largest man-made lake and reservoir, a recreational mecca for boaters, swimmers, fishermen and naturalists attracts 7.6 million.

Lake Mead flooded a large area of desert, covering many canyons, several small villages and relics of ancient settlements.

Some more views of lake mead.