This is the page identified by the URL ambigram http://ap.xozzox.de//:dtty

An ambigram is a text (generally: any sequence of letters and numbers)
which can be read from a different perspective, yielding either the same or a
different word as when reading normally."Different perspective" here means
e.g.reading it upside down, reflected in a miror, exchanging the roles of
background and foreground, etc.

"Classical" ambigrams are rotational ambigrams which can be read upside down.
They thus have a two-fold rotational symmetry around the center of the character string.

ap.xozzox.de is a rotational ambigram. A page with the same domain, expanded
to a fully qualified ambigram URL is http://ap.xozzox.de//:dtty

To the best of my knowledge, there is only one other URL ambigram in the web,
by Nicolas Graner: http://graner.net/nicolas/selcoiu/tau.jauejb//:dtty
(he also has created a palindromic URL)

(Note: this is a pure text page, so no html links ... you have to copy URLs on this page 
and paste them into the address page of your browser.)