A sign for the Basilica Cistern & tram next to it

A sign for the Basilica Cistern & tram next to it

Stairs leading to the underground cistern

Stairs leading to the underground cistern

The Basilica Cistern - columns in rows

The Basilica Cistern - columns in rows

Coins thrown in the water

Coins thrown in the water

Rows of underground columns of this old cistern in Istanbul

Rows of underground columns of this old cistern in Istanbul

Interior of the cistern

Interior of the cistern

Ceiling of the Basilica Cistern

Ceiling of the Basilica Cistern

A model of Panorama 1453 History Museum on display inside the cistern

A model of Panorama 1453 History Museum on display inside the cistern

Another view of the model of the museum

Another view of the model of the museum

Model depicting old city of Constantinople

Model depicting old city of Constantinople

Columns - seen from an angle

Columns - seen from an angle

Top of a support column

Top of a support column

Lights inside the cistern

Lights inside the cistern

Low lights inside creating perfect scene

Low lights inside creating perfect scene

Columns lined on both sides

Columns lined on both sides

Close up of two columns

Close up of two columns

Fish inside the cistern

Fish inside the cistern

A sign next to a column

A sign next to a column

Wish Column or Sweating Column of the Basilica Cistern

Wish Column or Sweating Column of the Basilica Cistern

Tourists were queuing for their turn at that column

Tourists were queuing for their turn at that column

Ceiling of the cistern

Ceiling of the cistern

Basilica Cistern among lights

Basilica Cistern among lights

Bottom of a column with low water level

Bottom of a column with low water level

A designed base of a column

A designed base of a column

Head of Medusa

Head of Medusa

Medusa the Guardian - close up

Medusa the Guardian - close up

Crowd around Medusa's column

Crowd around Medusa's column

It was hard to move - I had to wait for my turn

It was hard to move - I had to wait for my turn

Medusa's head up side down at another column

Medusa's head up side down at another column

Medusa up side down - Close up

Medusa up side down - Close up

Walkway for the visitors

Walkway for the visitors

Very strong looking pillars

Very strong looking pillars

Rows of columns and pillars

Rows of columns and pillars

Low light in one part of the cistern

Low light in one part of the cistern

I am not sure about the purpose of this structure

I am not sure about the purpose of this structure

Basilica seen from the stairs

Basilica seen from the stairs

A Protective cover below the ceiling

A Protective cover below the ceiling

Another view of the covers

Another view of the covers

Exit door of the Basilica Cistern and a security guard

Exit door of the Basilica Cistern and a security guard