  Over the last two decades, we have intensified our search for a ghost
particle, with the hope that it would provide us with information on the
darkest places of our Universe. This quest has been conducted from the deep
caves of the Earth, up to the upper layers of our atmosphere, and from one Pole
to another. In this review, I will summarize the odyssey of the search for
astrophysical neutrinos. I will focus on the recent discoveries and technical
developments that led us to the point where we stand now. I will highlight the
different types of neutrino detectors, and their performances enabling the
discovery of high-energy astrophysical neutrinos, and the understanding of
their sources behind. Finally, I will present some possible paths to the
remaining uncharted territory of the ultra-high-energy neutrino astronomy.
