This is a list in progress. Suggestions are welcomed.
In no particular order (except of course pre-mortem):
> Take the Chihuahua al Pacifico train through the Copper Canyon, Mexico.
> Sail the seas on a wooden square-rigger.
> Jump from a plane.
> Bungee from a bridge.
> Ride a Triumph Thunderbird (or Norton 500/600/650/750) across the length of Chile.
> Hot air balloon over the Masai Mara or Serengeti.
> Trek the Milford Track and mountain climb in New Zealand.
> Visit the Souks of Morocco.
> Swim with sharks off S. Africa.
> Swim with dolphins.
> Drive Route 66 across N.America in a Plymouth Turismo or Dodge Charger circa 70s (Ford Torino, Chevy or Cadillac also possibilities).
> Run with the bulls at Pamplona. (tee hee!)
> Cycle around S. France on a wine-tasting trip.
> Walk the Wall of China.
> DONE See the Pyramids of Giza and Luxor.