North celestial pole seen at the zenith. All stars rise and set. All northern stars are circumpolar. Celestial poles are seen on the horizon. South celestial pole is seen at the zenith.
All southern stars are circumpolar.
The ecliptic can be seen directly overhead at local noon on June 21. The ecliptic can be seen directly overhead at local midnight on December 21. The Sun is at the zenith on March 21. The Sun fails to rise above the horizon between March 21 and September 21. Only place on Earth where Pisces and Virgo can be seen at the zenith.