I've been thinking about travel a lot this week. One year ago today we were in South America, and three months ago we were in Alaska. In 12 months we crossed the Equator, both Tropics and got within 120 miles of the Arctic Circle. That's not bad for one year.
It made me wonder just what the farthest points are that we have reached. So, with the help of trip diaries and Google Earth, I looked them up.
Northern Most: 64° 50' 37.87" N 147° 43' 28.30" W Fairbanks, Alaska
Southern Most: 46° 36' 48.39" S 168° 21' 25.56" E Bluff, New Zealand
Eastern Most: 56° 48' 2.06" N 41° 51' 45.46" E Palekh, Russia
Western Most: 52° 16' 56.26 N 104° 16' 24.13" E Irkutsk, Russia
[The last one may seem a bit odd, as depending on how you look at it, it could be counted as "East". But we left home traveling west to get there, so I'm counting it as "West".]
So far we have covered all but 63° of the Earth's circumference. It's mostly the bit with India, the Himalayan Countries, and some of China in it at lower latitudes, and the central part of Russia in the North. I hope to close that gap someday by taking the Trans-Siberian for it's whole length.
I've drawn the boundaries on a map:

Doing it this way distorts things a bit. It shows the outside most points, but of course we haven't covered everything inside the box. We have not been to most of Canada, or the Pacific basin; and we've never set foot on Africa, even though it's inside the box. Still, it's quite a lot of area.
We have visited 5 of the 7 continents; North & South America, Europe, Asia, and Australia. That leaves Africa and Antarctica.
Oceans and Seas are a bit more tricky, as the boundaries between one body of water and another are rather arbitrary, as all the World's oceans are really one. We have bathed in the Pacific, the Atlantic, the Indian Ocean, the Southern Ocean, the Caribbean, and the Mediterranean. (Some of the "seas", like the Adriatic and the Ionian and the Libyan Sea are really just regions of the Mediterranean Sea, so I don't know if I should count them separately.)
I'm not really entertaining the idea of swimming in the Arctic Ocean anytime soon.
I'd be interested in hearing where you guys have traveled.