
1) Educational journey 2) Hardly a quick trip 3) Science fiction book series 4) Type of tourism
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https://www.crosswordclues.com/clue/grand-tour

one of the highest ranked national stage races, ranked hors category (beyond category), three-week competitions including Tour de France, Giro d'Italia, and Vuelta a Espana.
Found on
http://bikecult.com/bikecultbook/glossary_english.html

The Grand Tour was the traditional trip of Europe undertaken by mainly upper-class European young men of means. The custom flourished from about 1660 until the advent of large-scale rail transit in the 1840s, and was associated with a standard itinerary. It served as an educational rite of passage. Though primarily associated with the British nobi...
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http://en.wikipedia.org/wiki/Grand_Tour
[cycling] In road bicycle racing, a Grand Tour refers to one of the three major European professional cycling stage races: Tour de France, Giro d`Italia and Vuelta a España. Collectively they are termed the Grand Tours, and all three races are similar in format being multi-week races with daily stages. They have a special status in the UCI...
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http://en.wikipedia.org/wiki/Grand_Tour_(cycling)

A proposal, first put forward in the late 1960s, for a single spacecraft to fly by all four major outer planets – Jupiter, Saturn, Uranus, and Neptune – by taking advantage of a once-in-179-year alignment of these worlds and the multiple gravity-assists this celestial configuration allow...
Found on
http://www.daviddarling.info/encyclopedia/G/Grand_Tour.html

European tour made by young, wealthy 18thC men, following completion of a formal education. The aim was to absorb the culture, history and contemporary art of the great European cities.
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http://www.encyclo.co.uk/visitor-contributions.php

[
n] - an extended sightseeing tour undertaken for pleasure
Found on
http://www.webdictionary.co.uk/definition.php?query=grand%20tour

In eighteenth century became essential part of education for those who could afford it. Developed from enormous admiration for classical civilisation, especially that of Rome, for the Italian Renaissance, and to a lesser extent for the civilisation of France as exemplified by the court of Louis XIV at Versailles. Italy was seen as a vast museum of ...
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https://www.encyclo.co.uk/local/20873
noun a sightseeing tour of a building or institution
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https://www.encyclo.co.uk/local/20974

A trip undertaken by members of the elite to broaden educational horizons. In the eighteenth century, a Grand Tour increasingly came to be undertaken instead of, or in addition to, attending university. Young men (and some women) would be accompanied around Europe by experienced guides, often armed with guidebooks about what they should see. Routes...
Found on
https://www.encyclo.co.uk/local/23050
No exact match found.