London at night, as seen from space
This image of London by night was taken in February 2003 from the International Space Station. North is toward the top and slightly left in this nighttime view. The encircling "London Orbital" highway by-pass, the M25, is easiest to pick out south of the city. Even farther south are the lights of Gatwick airport and just inside the western (left hand) stretch of the Orbital is Heathrow. The darkened Thames river estuary fans out to the city's east. In particular, two small dark spots - Hyde Park and Regents Park[?] - stand out slightly west of the densely packed lights at the city's core.
For a high-res version of the above image see High Res - 908 kBytes (http://antwrp.gsfc.nasa.gov/apod/image/0304/london_iss_full.jpg).