National Observatory of Athens

Orchomenus or Orchomenos or Orkhomenos (Greek: Ὀρχομενός) was an an

Argyrokastro (Ελληνικά. Αργυρόκαστρο, 'silver castle') is a castl

The Salmeniko Castle (Ελληνικά. Κάστρο του Σαλμενίκου, Kast

Nemea (Gr. Νεμέα) is an ancient site near the head of the valley of t

The Patras Castle (Ελληνικά. Κάστρο Πατρών) was built around the mi

Patras Lighthouse (ell. Faros Patras) is the symbol of the Greek city

The Rio Castle (Ελληνικά. κάστρο του Ρίου or Καστέλι της Πάτρας)

The Rio-Antirrio bridge (Greek: Γέφυρα Ρίου-

The W. M. Keck Observatory is a two-telescope astronomical observatory

Griffith Observatory is in Los Angeles, California, United States.

The Lick Observatory is an astronomical observatory, owned and

Purple Mountain Observatory (Шаблон:Zh), also known as Zijinshan Astro

The Mount Washington Observatory (MWObs) is a private, non-profit