Here is a random and incomplete list of things I can say I've done or can do:

visited 44 US states and Puerto Rico

visited 18 other countries in the Americas and Europe

became an open-water certified SCUBA diver

watched a full moon rise over the Grand Canyon

piloted an airplane over an active volcano in Hawaii, over Kitt Peak, Mt. Hopkins, and the Golden Gate Bridge

seen Old Faithful erupt in Yellowstone National Park (back when it was more faithful?)

played the flute in the Tennessee All-State band

sung in Notre Dame de Paris

ridden the "chunnel" train underneath the English Channel

picked wild coffee in Colombia

sea kayaked off the coast of Brazil and in St. John USVI

entered East Berlin through Checkpoint Charlie (when the Berlin Wall still was)

viewed a Total Solar Eclipse on Marienplatz in Munich in the rain, alongside 12,000 other people

had an asteroid named after me

stood on the 2nd highest peak in the Bavarian Alps, and the 4th highest peak in Mexico

swam with and petted manatees in Florida (and heard mother-baby conversations)

ridden in an airplane which had no engine, ridden in a helicopter over downtown Atlanta

flown airplanes with zero, one and two engines

flown (as a passenger) by seaplane between Caribbean islands

been in a submarine 80 feet below the surface

gotten married, and stayed that way...

given birth twice

seen what I'm pretty sure was a cougar in the wild

visited archeological sites in Mexico and touched 2000+ year old pottery shards

helped take apart an entire automotive engine, and put it back together so that it worked

made attempts at speaking French & Spanish, and more pathetic attempts at German & Italian

watched a Bald Eagle soar over my house

watched spacecraft launches on Delta II and Atlas rockets

measured a tree’s circumference of 22 feet

been parasailing in tandem with my daughter, looking down at the birds flying beneath us

walked around on top of the world’s largest radio telescope (Arecibo) and the largest fully-steerable radio telescope (GBT)

And the things I haven't done yet but still hope to do:

see the other 6 states, especially Alaska

see polar bears in the wild

go North of the Arctic circle and South of the Antarctic circle

visit at least one place on the other 4 continents

go to Africa and see wild giraffes, elephants, zebras....

touch a redwood tree

watch the space shuttle take off

stand on a glacier

see the green flash

visit Iceland where the mid-Atlantic ridge comes above water

see the Great Wall of China

watch a volcano erupt

feel an earthquake

And, of course, see the Earth from orbit, and walk on the moon...how about jump off an asteroid?