The Blackrock Castle sitting on the Cork Harbour's edge

The Blackrock Castle sitting on the Cork Harbour's edge

Blackrock Castle seen through the main entry gate

Blackrock Castle seen through the main entry gate

Another view of the castle through pedestrian door

Another view of the castle through pedestrian door

The Blackrock Castle and it's courtyard

The Blackrock Castle and it's courtyard

Currently this castle is the site of an observatory

Currently this castle is the site of an observatory

Interactive touch pods of the observatory

Interactive touch pods of the observatory

This  observatory has interactive screens to show information about the astronomy

This observatory has interactive screens to show information about the astronomy

One of the screens showing a documentary - The Balckrock Castle Cork

One of the screens showing a documentary - The Balckrock Castle Cork

A room inside the Balckrock Castle Observatory

A room inside the Balckrock Castle Observatory

This giant balloon is used for educational purposes

This giant balloon is used for educational purposes

A corridor leading to the astronomy room

A corridor leading to the astronomy room

Entry to the tall tower is on LHS

Entry to the tall tower is on LHS

An old fire place inside the Blackrock Castle Observatory Cork

An old fire place inside the Blackrock Castle Observatory Cork

Cannons were installed in this area in order to protect the Cork Harbour

Cannons were installed in this area in order to protect the Cork Harbour

View of the Cork Harbour from the top of the castle

View of the Cork Harbour from the top of the castle

The River Lee and a small car park next to it

The River Lee and a small car park next to it

The Cork Harbours - seen from the top of the castle

The Cork Harbours - seen from the top of the castle

Shipping containers inside the Cork Harbour

Shipping containers inside the Cork Harbour

A cafe inside the courtyard of the Blackrock Castle Observatory

A cafe inside the courtyard of the Blackrock Castle Observatory

Tall tower of the Blackrock Castle Cork

Tall tower of the Blackrock Castle Cork

Astronomy dome and tower of the castle

Astronomy dome and tower of the castle

A beautiful view of the Cork Harbour

A beautiful view of the Cork Harbour

Banks of the River Lee

Banks of the River Lee

Lower end of the castle - The Blackrock Castle Observatory Cork

Lower end of the castle - The Blackrock Castle Observatory Cork

Some of the equipments installed on top of this roof

Some of the equipments installed on top of this roof

Ceiling inside the observatory

Ceiling inside the observatory

This 16th century castle is 2km from Cork city centre

This 16th century castle is 2km from Cork city centre

An old cannon inside the courtyard

An old cannon inside the courtyard

View of the River Lee through a window

View of the River Lee through a window

A long cannon on display - The Blackrock Castle Cork

A long cannon on display - The Blackrock Castle Cork

Courtyard of the Blackrock Castle

Courtyard of the Blackrock Castle

Beautiful towers of the castle

Beautiful towers of the castle

Exterior of the Blackrock Castle

Exterior of the Blackrock Castle

This castle's main purpose was to repel pirates

This castle's main purpose was to repel pirates

Zaighum Abbas Ranjha - The Blackrock Castle Observatory Cork

Zaighum Abbas Ranjha - The Blackrock Castle Observatory Cork

A BMW car parked in car park next to the castle

A BMW car parked in car park next to the castle

A painting on wall showing the Blackrock Castle

A painting on wall showing the Blackrock Castle