Since TAR19 will film this late Spring or Summer. My idea is to have the race visit 4 continents/3 new countries and start/finish not on the west coast or east coast USA.
Start: Houston, Texas, USA
Leg 1: Dusseldorf, Germany
Leg 2: Cologne/Bonn, Germany
Leg 3: Copenhagen, Denmark
Leg 4: Riga, Latvia
Leg 5: Goa, India
Leg 6: Chiang Mai, Thailand
Leg 7: rural Chiang Mai Province
Leg 8: Okinawa, Japan
Leg 9: Palau (task at Jellyfish Lake)
Leg 10: Vancouver, BC, Canada
Leg 11: Vancouver, BC
Leg 12: Salt Lake City, Utah