England, Greater London, London Borough of Tower Hamlets. St Katharine by the Tower plaque near the entrance to the St Katharine Docks, on the north bank of the River Thames near the London Tower Bridge.

England, Greater London, London Borough of Tower Hamlets. Sun dial near the entrance to the St Katharine Docks, on the north bank of the River Thames near the London Tower Bridge.

England, Greater London, London Borough of Tower Hamlets. Sun dial near the entrance to the St Katharine Docks, on the north bank of the River Thames near the London Tower Bridge.

England, Greater London, London Borough of Tower Hamlets. Looking towards the gatehouse of the Tower of London with the distint london skyline (including the Gherkin) in the distance.

England, Greater London, London Borough of Tower Hamlets. Old and modern buildings, part of the Tower of London Complex with the financial district in the distance.

England, Greater London, London Borough of Tower Hamlets. Traitors' Gate part of the Tower of London, located on the north bank of the River Thames.

England, Greater London, London Borough of Tower Hamlets. Catapult used as a defensive weapon for the Tower of London, located on the north bank of the River Thames.

England, Greater London, London Borough of Tower Hamlets. Close up view of ornate street lamp outside the Tower of London, located on the north bank of the River Thames.

England, Greater London, London Borough of Tower Hamlets. Close up view of one of the towers of the Tower of London, located on the north bank of the River Thames.

England, Greater London, London Borough of Tower Hamlets. Close up view of one of the towers of the Tower of London, located on the north bank of the River Thames.

England, Greater London, The City of London. Abstract view of modern architecture including the famous Gherkin building, in the financial square mile in the City of London.

England, Greater London, The City of London. Abstract view of modern architecture including the famous Gherkin building, in the financial square mile in the City of London.

Scotland, Scottish Highlands, Cairngorms National Park. Tower Lodge located near Bridge o'Ess at the public road entrance to Glen Tanar.

Scotland, Scottish Highlands, Cairngorms National Park. Tower Lodge located near Bridge o'Ess at the public road entrance to Glen Tanar.

Scotland, Scottish Highlands, Castle Stalker. Castle Stalker near Port Appin is a four story Tower House located on a tidal islet on Loch Laich, an inlet off Loch Linnhe.

England, County Durham, Durham City. Detail of the towers of Durham Cathedral.

England, County Durham, Durham City. Detail of the towers of Durham Cathedral.

Scotland, Edinburgh, Balmoral Hotel. Balmoral Hotel clock tower, often referred to as the most photographed clock tower in Scotland.

Scotland, Edinburgh, Edinburgh City. Balmoral Hotel and clock tower with the North Bridge below, linking Princes Street with the Edinburgh Old Town.

Scotland, Edinburgh, Balmoral Hotel. Balmoral Hotel clock tower, often referred to as the most photographed clock tower in Scotland.

Scotland, Edinburgh, Edinburgh City. Balmoral Hotel and clock tower with the North Bridge below, linking Princes Street with the Edinburgh Old Town.

Scotland, Edinburgh, Balmoral Hotel. Balmoral Hotel clock tower, often referred to as the most photographed clock tower in Scotland.

Scotland, Edinburgh, Camera Obscura. The Camera Obscura is located on a tower which had originally been the townhouse of the old Larid of Cockpen. This building was to become known as the Outlook Tower before its present title of the Camera Obscura.

England, Lancashire, Blackpool. Blackpool Tower at night during the illuminations.

England, Lancashire, Blackpool. Preserved Blackpool 'Standard Double Decker' Tram – No 147 (Michael Airey) heading to the tower.

England, Northumberland, Wallington. The Clock Tower (completed in 1754) at the Wallington Hall National Trust property in Northumberland.

England, Northumberland, Wallington. The Clock Tower (completed in 1754) at the Wallington Hall National Trust property in Northumberland.

Scotland, Edinburgh, Leith. A stylish hotel, formally a Seaman's mission, at Tower Place in Leith.

Scotland, Edinburgh, Camera Obscura. The Camera Obscura is located on a tower which had originally been the townhouse of the old Larid of Cockpen. This building was to become known as the Outlook Tower before its present title of the Camera Obscura.

Scotland, Edinburgh, Balmoral Hotel. Often referred to as the most photographed clock tower in Scotland, the Balmoral Hotel is an impressive feature of the Edinburgh skyline.

England, Tyne & Wear, Newcastle Upon Tyne. Nuns Moor with high rise flats of Kenton in the distance.

England, Tyne & Wear, Burradon Tower. Sycamore Trees and the ruins of the Burradon Tower, a townhouse built around 1553 by Bertram Anderson.

England, Tyne & Wear, Burradon Tower. Sycamore Trees and the ruins of the Burradon Tower, a townhouse built around 1553 by Bertram Anderson.

England, Tyne & Wear, Saltwell Park. Saltwell Towers situated in Saltwell Park, a fine example of a Victorian Park located in the borough of Gateshead.

England, Tyne & Wear, Saltwell Park. Saltwell Towers situated in Saltwell Park, a fine example of a Victorian Park located in the borough of Gateshead.

England, Tyne & Wear, Saltwell Park. Saltwell Towers situated in Saltwell Park, a fine example of a Victorian Park located in the borough of Gateshead.

Scotland, Scottish Borders, Smailholm Tower. The well preserved remains of Smailholm Tower. The location of the rectangular tower on a hilly outcrop ensures that it dominates the surrounding landscape for miles.

Scotland, Scottish Borders, Greenknowe Tower. View from window in Greenknowe Tower, framed by the stone frame of the building.

Scotland, Scottish Borders, Greenknowe Tower. Greenknowe Tower, a typical example of a tower-house. The tower-house was the traditional home of the Scottish Laird.

People's Republic of China, Hong Kong Special Administrative Region, Kowloon. The Clock Tower in Tsim Sha Tsui, a famous landmark of Kowloon.

Argentina, The Lake District, Junín De Los Andes. Church tower against a blue sky in Junín De Los Andes.

Argentina, The Lake District, Junín De Los Andes. Church tower against a blue sky in Junín De Los Andes.

Czech Republic, Prague, Petrin Tower. The Petrin lookout tower provides fantastic views across the city of Prague.