Labyrinth (noun)

1. A complex system of paths or tunnels in which it is easy to get lost.
2. A complex and confusing arrangement of interconnected parts or activities.

Origin:

Late middle english: via latin from greek labyrinthos, from laburinthos "maze", from labein "to go" + anthos "flower" (because of the intricate ornaments on the floors of ancient mazes).

Examples:

1. The cave was a labyrinth of dark tunnels and narrow passageways.
2. The city's streets and alleys formed a labyrinth that was hard to navigate.
3. The building was a labyrinth of corridors and staircases.
4. The bureaucracy was a labyrinth of red tape and regulations.
5. The website was a labyrinth of links and menus that were hard to follow.