Panorama Photo

Anyone able to solve where I am and what city it is ?
I leave the panorama for the time of the riddle - to be frank, it is not good !

The hint I can give was shown as a triptychon on the location I took the pictures.

The city questioned can be or was seen left across the river

TO A SUNKEN CITY

FATHER OF WATERS, NATIVE GOD, FORGET
THE YESTERDAY OF AGES YOU WERE FREE,
NOR COUNT TOMORROW'S AEONS YOU WILL YET
REMAIN UNTRAMMELED IN YOUR MAJESTY.
WHEN BOLD INVADERS CAME, WITH BOAST PROFANE
TO MAKE YOU SLAVE, YOU BORE THEM LANGUIDLY;
TILL, WITH UNWONTED FEAR FOR YOUR DOMAIN,
A CITY HERE YOU GRAPPLED TO YOUR BREAST,
PLUNGING HER TOWERS IN YOUR TORRENT'S LANE
WHERE STILL THEY LIE, MAN'S WEAKNESS TO ATTEST;
N'R SPAR'D THEIR GRAV'S, WH'SE GHOSTS N'W STALK TH'TIDE,
BEWILDERED WHO THEIR SLEEP SHOULD THUS MOLEST;
IN VAIN THEY SEEK THE CITY WHERE THEY DIED,
HER GLORIES VANISHED AND THEIR REST DENIED.

O __________, MONARCH OF THE PLAIN,
DESPOILER OLD! WE MOURN YOUR VICTIM LOW.
NOW STAY THE MIGHTY MINIONS OF YOUR TRAIN,
THAT THIS POOR VALE MAY NO MORE HAVOC KNOW;
BID NOT FAR MOUNTAINS BURST TORRENTIAL SPLEEN,
NOR TEMPESTS WREAK THEIR LIGHTNING SOULS IN WOE.
FOR HERE, BENEATH YOUR FLOOD'S DISSEMBLING SHEEN,
A CITY LIES, HER WALLS AND SPIRES DOWN-HURLED;
NO STONE IS LEFT WHEREON SOME CHISEL KEEN
MAY TELL HER RAVISHED FAME UNTO THE WORLD.
AND, THOUGH YOUR RUTHLESS FURY HER DEFILED,
NOW O'ER HER MIRY TOMB YOUR WAVES ARE PEARLED
WITH SUNBEAMS, ALL TOO FAIR TO BE REVILED,
IN DANCE IRONIC O'ER HER RUINS PILED.

GOD'S TEMPLE FLOOR THESE LEVEL WATERS PAVE,
AND BY THESE HILLS HIS ALTARS ARE DEFINED;
THE AZURE-CEILINGED HEAVEN DOMES THE NAVE,
WHILE, FAR BELOW, TO WAT'RY CRYPT ASSIGNED,
THE MOTHER OF A THOUSAND CITIES LIES,
IN NATURE'S VAST CATHEDRAL DEEP ENSHRINED,
BUT NEVER ON THAT BARREN FLOOR OUR EYES
MAY FIND INSCRIPTION O'ER HER WESTERN SKIES;
HOW ON HER HOPE THERE BROKE A DREADFUL KNELL;
AGHAST WITH FEAR, FROM DOOM SHE COULD NOT STIR;
SHE PALED, HER GLORY CLUTCHING AS SHE FELL,
DESPOILED FOREVER! YET THE SOUL OF HER
WENT NOT INTO THE SUNKEN SEPULCHER.