Solitary Dog Sculptor I

People walk through Grand Central Terminal on November 1, 2012 in New York City. (Mario Tama/Getty Images) #

Passengers board a train as they rush home to be with their families in remote villages ahead of the Muslim festival of Eid al-Adha, in Dhaka on October 25, 2012. (Stringer/AFP/Getty Images) #

People wait for their train to stop at the Solna subway station on November 6, 2012 in Stockholm. Over 90 of the 100 subway stations in Stockholm have been decorated with sculptures, mosaics, paintings, installations, engravings and reliefs by over 150 artists. (Jonathan Nackstrand/AFP/Getty Images) #

Clown Andri Hendri performs on a commuter train in Jakarta on January 9, 2013. Hendri earns about 150,000 rupiah ($15.60) a day from commuters when he performs on trains. (Beawiharta/Reuters) #

An actress in period costume poses for photographers next to a steam train which used to carry passengers in the 19th century, at Moorgate station in London on January 13, 2013. "The Tube" is celebrating its 150th anniversary in 2013. (Facundo Arrizabalaga/EPA) #

People sleep inside a circular train stopped at Yangon's central station September 17, 2012. Around Yangon, with its growing and increasingly demanding population of almost five million, a circular train operates, moving passengers through its suburbs. On a three hour long ride, a train made of rusted vehicles, marked with different classes but little visable difference between them, takes passengers around the city stopping briefly at numerous small stations. Barely changed since the British colonial era in the early 20th century, some of the decades-old buses and trains are starting to be retired. (Damir Sagolj/Reuters) #

A woman reacts as people join the No Pants Subway Ride on the uptown 6 train in New York on January 13, 2013. The event is an annual flash mob and occurs in different cities around the world. (Carlo Allegri/Reuters) #

Commuters walk on an installation of a musical staircase designed like a piano at a train station in Osasco, Brazil on January 10, 2013. Out of 42 steps, 34 have been fitted with "piano keys" that activate when stepped on. (Paulo Whitaker/Reuters) #

Freight trains are readied at the railroad shunting yard in Maschen, Germany on September 23, 2012. (Fabian Bimmer/Reuters) #

Workers keep an eye on train traffic coming and going from grand Central Terminal from a master control room high atop the building in New York on January 8, 2013. Grand Central terminal celebrated its 100th anniversary on February 1. (Kathy Willens/Associated Press) #

People gather for the inauguration of the Porta Susa high-speed train station in Turin on January 14, 2013. (Alessandro Di Marco/EPA) #

Thousands throng a platform waiting for trains to take them home after the Maha Kumbh festival in Allahabad, India on February 10, 2013. (Saurabh Das/Associated Press) #

People ride on top of a northern-bound train toward the US-Mexico border in Juchitan, Mexico on April 29, 2013. (Eduardo Verdugo/Associated Press) #

A train is loaded with coal at the Borodinsky opencast colliery near the Siberian town of Borodino on November 15, 2012. The Borodinsky colliery is the biggest opencast coal mine in Russia - 4 miles long and 328 feet deep - and was built from 1945 to 1949 by gulag prisoners to produce about 20 million tons of coal a year. (Ilya Naymushin/Reuters) #

A train of the Harz Narrow Gage Railway runs to the summit of the Brocken, the highest mountain of the Harz, Germany on January 15, 2013. (Matthias Bein/EPA) #

A Lego train passes through a model of the Tanjung Pelepas shipyard during a media preview of Legoland Malaysia in Nusajaya, Malaysia on September 14, 2012. (Edgar Su/Reuters) #

Dave Patterson tinkers with a model train before the Model Rail Scotland exhibition on February 21, 2013 in Glasgow. (Jeff J Mitchell/Getty Images) #

An employee holds a toy train during the London Toy Fair in Olympia, central London, on January 23, 2013. (Carl Court/AFP/Getty Images) #

A train made of chocolate during a Guinness Book World record event ahead of the Brussels Week of Chocolate, entices at Brussels South station on November 19, 2012. The train by Andrew Farrugia of Malta is made of 1,285 kg of chocolate and is 34.05 meters long. (Julien Warnand/EPA) #

A vendor sorts vegetables next to a railway track as a train passes by, in Dhaka on September 10, 2012. (Andrew Biraj/Reuters) #

Russia's President Vladimir Putin pauses in his railway car before a meeting on the development of railways and railway service in Moscow on October 19, 2012. (Alexey Druzhinin/RIA-NOVOSTI/ POOL/AFP/Getty Images) #

Passengers crowd a carriage on a train bound for Chengdu at a railway station in Shanghai on January 15, 2013. An estimated 224 million passengers travelled via trains during the Spring Festival. (Aly Song/Reuters) #

A conductor checks tickets onboard the new evening commuter train on November 13, 2012 as it winds its way from Nairobi's Central Business District to the new railway station of Syokimau on its first day of commercial operation. (Georgina Goodwin/AFP/Getty Images) #

Mercedes Robinson and other members of the Victory & Deliverance gospel choir sing on the 2012 Alaska Railroad Holiday Train as it cruises along the Turnagain Arm to Indian and back to Anchorage, Alaska on December 1, 2012. (Bob Hallinen/The Anchorage Daily News/Associated Press) #

The Le Burgeoise wagons of the A Line subway in Buenos Aires carry passengers on January 11, 2013 during the so-called last ride of the historic trains. Buenos Aires city Mayor Mauricio Macri decided to replace the fleet with Chinese-made wagons. The A Line was the first subway in the southern hemisphere and its trains are among the ten oldest still working daily. The La Brugeoise wagons were constructed between 1912 and 1919 by La Brugeoise et Nicaise et Delcuve in Belgium. (Leo La Valle/AFP/Getty Images) #

A model presents a creation during the "Express Fashion" catwalk show onboard the Dubai Metro on January 23, 2013. (Jumana El Heloueh/Reuters) #

Lukasz Rostkowski, alias L.U.C (left) and Dominik Smuzny of Poland perform during "Collecting & Breeding Human Time" on the Cosmic Underground art train in Riga, Latvia railway station on September 24, 2012. Cosmic Underground is a multidisciplinary train connecting the East and West of Europe in a two-month journey from Estonia to Portugal and tells a story of time dimension through audiovisual installations, theatrical performances and live music in ten cargo train carriages. (Ints Kalnins/Reuters) #

A man rides a train on Tokyo's Yurikamome Line that runs without any drivers or conductors along Tokyo Bay. (Shizuo Kambayashi/Associated Press) #

Revelers wait for a subway train as they make their way to the Sambadrome for the first night of the annual Carnival parade in Rio de Janeiro on February 10, 2013. (Pilar Olivares/Reuters) #

A commuter rides a train painted with murals promoting post-election peace in Nairobi on February 25, 2013. (Thomas Mukoya/Reuters) #

Snow falls on Istiklal Avenue in Istanbul on January 7, 2013. (Bulent Kilic//AFP/Getty Images) #

A tram runs in Lisbon on October 18, 2012. (Rafael Marchante/Reuters)#

A man smokes a cigarette as he stands with his bike on a local train in New Delhi on November 8, 2012. (Kevin Frayer/Associated Press)#

Students in traditional dress walk near a 1860's-era steam locomotive in the Carlos Antonio Lopez Railway maintenance shed, currently a museum, before dancing at a cultural fair in Sapucai, Paraguay on October 12, 2012. The steam train, inaugurated on October 21, 1861 for cargo and passengers, shut down in 2001 before being resurrected in 2012 as a tourism attraction. (Jorge Saenz/Associated Press)#

A passenger peers from a train heading to the Once train station in Buenos Aires on January 28, 2013. (Natacha Pisarenko/Associated Press)#

Miners Sakiba Colic (right) and Semsa Hadzo, coal technologists, ride a coal mine train during their 8-hour shift in the mine in Breza, Bosnia on January 16, 2013. (Amel Emric/Associated Press)#

A Soyuz rocket is rolled out to the launch pad by train on October 21, 2012 at the Baikonur Cosmodrome in Kazakhstan. (Bill Ingalls/NASA/Associated Press)#

A crane lowers a retired Blue Line subway car into the Boston subway's underground Emergency Training Center on September 17, 2012 for first responders to undergo training for emergencies on subways, trolley cars, and buses. (David L Ryan/Globe Staff)#

People look at a giant drilling machine completing the 4 kilometer-long Saverne tunnel beneath the Vosges mountains in Eckartswiller, France during a ceremony on February, 25, 2013, as part of the second phase of construction works for the east European high speed train line between Paris and Strasbourg. (Patrick Hertzog/AFP/Getty Images)#

An urban explorer runs through an unguarded subway tunnel under construction in Toronto last year. The tunnel is part of a new extension being built in the city called the Toronto-York Spadina Subway Extension, and is expected to open by 2015. (Tom Ryaboi/tomry)#

Two train drivers shake hands after stopping at Gara de Nord station during a two-hour protest by railway workers over delayed salary payments in Bucharest on January 16, 2013. (Bogdan Cristel/Reuters)#

A driverless vehicle, controlled by an advanced navigation system, arrives at the Personal Rapid Transport station at the Masdar Institute campus in Abu Dhabi in the United Arab Emirates. The United Arab Emirates introduced the world's longest automated rail system, 32 miles, in Dubai in 2009. (Kamran Jebreili/Associated Press)#

Railway workers clean a train in Bangalore on February 26, 2013. The railway, the country's largest employer with some 1.4 million people on its payroll, runs 11,000 passenger and freight trains and carries 19 million people daily. (Manjunath Kiran/AFP/Getty Images)#