The Oyster Union House, Blackstone Block, built in 1714, one of Boston's oldest surviving streets, Boston, Massachusetts, USA

Tetrapylon on Graeco-Roman columned main street, 1st century AD, Palmyra, Syria, Middle East

Modern skyscraper block towers above the 200 year old Asiatic Society Library and Town Hall built in 1804, Mumbai, India, Asia

Clearning a tree-slide, Lowari Pass, Pakistan, Asia

Massive snow drifts block the Kirkstone Pass road above Ambleside in the Lake District, Cumbria, England, United Kingdom, Europe

Massive snow drifts block the Kirkstone Pass road above Ambleside in the Lake District, Cumbria, England, United Kingdom, Europe

Las Vegas, Nevada, USA from the air.

The A591 blocked by flood debris at Thirlmere in the Lake District, Cumbria, England, United Kingdom, Europe

A tower block off Euston Road in London, England, United Kingdom, Europe

Melbourne police staging a campaign to stop and check drivers for drinking and driving and taking drugs and driving, Victoria, Australia, Pacific

Waterways, an apartment block on Derby Road in Loughborough, Leicestershire, England, United Kingdom, Europe

Tower block on Euston Road, London, England, United Kingdom, Europe

Tower block on Euston Road, London, England, United Kingdom, Europe

Exclusive high rise tower block developments in Dubai, United Arab Emirates, Middle East

Makati, Philippines

famous Yan An intersection in Shanghai, long exposure at night, People's Republic of China, Asia

famous Yan An intersection in Shanghai, People's Republic of China, Asia

Aerial view, row houses, Solarsiedlung Bismarck solar village, Haverkamp, Gelsenkirchen, Ruhrgebiet region, North Rhine-Westphalia, Germany, Europe

Low energy houses in the Vauban district, designed for the EXPO 2010 in Shanghai, Freiburg, Breisgau, Baden-Wuerttemberg, Germany, Europe

Snow in Duesseldorf in the 1980s, North Rhine-Westfalia, Germany, Europe

Pedestrian crossing sign in front of apartment buildings

Car-free streets and communist residential buildings in Kaesong, North Korea, Asia

Aerial view, block perimeter development, Ruettenscheid, Essen, Ruhr Area, North Rhine-Westphalia, Germany, Europe

Borovitskaya Tower, Moscow Kremlin, Moscow, Russia

Wheel clamp from the police on a car, Pilsen, Bohemia, Czech Republic, Europe

Aerial photo, Teutoburgia Colliery Village, Herne, Ruhr area, North Rhine-Westphalia, Germany, Europe

Aerial view, apartment buildings, snow, Buettenberg, Ennepetal, North Rhine-Westphalia, Germany, Europe

Aerial view, residential buildings, snow, Milspe, Ennepetal, North Rhine-Westphalia, Germany, Europe

Sheep lying on a country road in Norway, Scandinavia, Europe

Iron chains block a path leading to a building, Old San Juan, Puerto Rico

Young man holding up his deactivated Police ID card. Former members of the Armed forces of Liberia and Liberian Nation Police block the road at EWA junctions demanding the President pay back payments for the years they were not paid under the Taylor regime. The protest ended in violence with tear gas being firied on the crowd.

Double yellow line on a street with traffic barriers and 'Road Closed' sign, Connecticut, United States of America

Volcano Lava Flowing Over Road National Park, Big Island, Hawaii

New Shoreham and Ferry dock on Block Island at dusk, Rhode Island, USA

A woman walks alone among the tall, leafless tree trunks in a forest, Arizona, United States of America

Side view mirror

Road block

Road block