what's the farthest north and south you have been?

labrador, canada - 53.7 latitude N
Belize - 17.10 latitude N

As far north as Vancouver BC and as far south as Chiapas.

Far north Mount Rushmore, SD, south Dallas TX, east Chicago IL and west Topeka KS.

Never been outside the continental US?

Nope and Topeka KS is 63 miles west of where I live.

If I did go overseas, there are many places I would love to go.

I once wanted to go as far north as the Fortress of Solitude. But the stupid travel agent kept insisting that "it wasn't real". Such bad service, when I go, I will go on my own!

I would love to go to the Laplands, Egypt, Rome, Göbekli Tepe, Turkey and Čachtice, Slovakia.

North = Norway
+
South = Singapore

As far north as Vancouver Canada and as far south as Panama.

Did you check out the Canal?

Not all of it, we didn't transit the canal but went into it part way. So we went through the locks on the Caribbean side.

North: Norway
South: Florida, USA

North: Orkney
South: Cape Town

This map has barely changed in a decade sadly:

North- Riga, Latvia
South- Slovakia
East- Vilnius, Lithuania
West- Dorset, England

North: Reykjavik, Iceland. Would recommend traveling there.

South: Punta Cana, Dominican Republic. Would not recommend traveling there. Mediocre beaches, the food is not so great, and to quote Woody Allen, in such small portions. To be fair, just going to the pool, the beach and eating every day is not my ideal vacation, but if that does it for you, I think there are better options.

west: vancouver
east: italy

West: Tahiti
East: Bermuda

North: Stratford-upon-Avon, England
South: Palenque, Mexico
East: Iwakuni, Japan
West: Honolulu, Hawaii

North: Montreal
East: Atlantic City, NJ
South: Orlando, FL
West: Cuperas Cove, TX

If we're doing all the compass points...

East: Warsaw, Poland
West: Also Florida

I guess East and West are relative to where you started, more so than North and South...