I have always had a wanderlust and love of foreign travel. I had the opportunity to live overseas for 9 years (5 in Saudi Arabia and 4 in Germany). I was able to travel extensively while living overseas.
However, when I retired in 2010 then retire completely in 2011, my wife and I have done 2-3 overseas travels every year since then.
I have visited 78 foreign countries and still love it.
We have traveled in nearly every way possible:
1) Land tours
2) Self drive tours, either using our own car (while living overseas) or renting a car.
3) Bus tours
4) Rail tours or just using the trains (in Europe and Japan).
5) Ocean cruises
6) River cruises
I am in my early 70s and still love to travel. We even have been back to places that we have visited before. Still, some places, like Venice for example, we have visited 5 times, is off our list now.
Rome is my favorite foreign city, since I love ancient history. Favorite countries include Great Britain, Italy, Japan, Peru, Canada and Israel.
We have learned to pace ourselves, but still plan to see a lot while touring. We easily still do a full day of touring, but have learned a few things about travel.
I remember watching a movie in the 60s or 70s called "If it is Tuesday it must be Belgium." It made fun of Americans on European tours the hit a lot of places for short times on a heavy pace. We don't do that anymore, since we have seen much of the World and probably 80% of our bucket list.
For example, we did a great 4 week drive tour of S. Wales and England in 2017 and except for three days did not drive more than two hours on a single day. We spend an average of 3 nights where we stopped, but we did do a couple of one day stops, like one at Warwick, England while on route from Chipping Campden to York.
We usually combine a cruise with a land tour, either on our own or guided tour. We recently did a great land tour of Cusco, The Sacred Valley and Machu Picchu, Peru prior to a cruise from Chile to San Diego. We also like doing transatlantic cruises after a European visit. Enjoyed a great visit in 2018 to Australia and New Zealand, then took a transpacific cruise from Sydney to Seattle.
Cruises are also great in visiting many out of the way ports that would otherwise be a pain to get to by air or rail. Places like Dubrovnik and the Greek Islands. We recently had a wonderful cruise of Norway that went all the way to the North Cape, above the Arctic Circle. It was wonderful and we never had to change hotels the entire way.
River cruises are great choice, but a bit expensive for places like the upper Nile river in Egypt, Russia from Moscow to St. Petersburg or the Douro Valley in Portugal.
We did a lot of spontaneous travel while living in Germany from 87-91. We would go to the train station, and just take the first train to our destination. This was before the internet and we usually didn't even book a hotel or B&B in advance. It worked just fine, until one trip, we found no hotel rooms available for many miles and had to leave our planned area for another.
Now I plan ahead and book hotels, tours and transport in advance. I find that researching what there is to see helps you to save time when you get there.
Also, planning saves dollars.
We generally don't just book a vacation to a place and just stay there for many days. We still want to see more of the World. Still, we may find a great place to stay and use it as a base to visit nearby cities, towns or sites. We never just go somewhere to relax. When we were employed and had sometimes high stress jobs, that was OK, but we relax a home all the time and never just plop down in a place like the Caribbean for two weeks to lay on the beach. I don't need skin cancer and exposure to the sun is not good. Also, we live on an island in South Georgia with a nearby beach.