24.0 miles:
21 minutes
When driving the world's longest overwater highway bridge, it is easy to imagine you are actually driving on the water. The 24-mile-long Lake Pontchartrain Causeway connects Metairie to Mandeville. Look for the New Orleans skyline visible from the bridge.
![Map pin](https://www.aaa.com/AAA/common/drivetrips/images/maps/ID564766.png)