others

Terence Davies' remarkable 2008 film, "Of Time and the City" explores many of the same themes, in a style which shares some similarities to "Sans Soleil," though Davies also uses a structure, technique and elements which are both unique and complementary to those Marker uses in his film. It's well worth viewing if you like "Sans Soleil."

[deleted]

I'd second Of Time and the City and offer Lisbon Story from Wenders.

10 on Ten
The Pervert's Guide to Cinema
Menq
Wax, or the Discovery of Television Among the Bees
Baraka, Koyaanisqatsi and its siblings.
Werner Herzog's documentaries.
Not a documentary, but L'intrus feels somewhat like a narrative version of SS.

Oh whisky, leave me alone.