|Dr Greg Spellman gives instructions for the first day - at Santa Monica pier|
|Learning about water management at Parker Dam|
|Tourism and Route 66|
|At the entrance to Grand Canyon National Park|
|Walking the Lava Flow Trail at Sunset Crater National Monument|
|Working in a National Park visitor centre.|
We covered more than 2,000 miles on the trip, staying in a different town most nights.
|One of the beautifully-decorated minibuses!|
|On the road again...|
We travelled through some fabulous landscapes.
|At Horseshoe Bend.|
After more than a week in the glorious wilderness, we ended the trip with visits to Las Vegas and Los Angeles.
|Viva Las Vegas!|
|Standing (a long way in front) of the Hollywood sign.|