There is a total of 21191 clues beginning with si
- Site of Pennsylvania power plant (abbr)
- Site of Perry's naval victory
- Site of Perry's victory
- Site of Perry's victory, 1813
- Site of Persepolis, now
- Site of Petrified Forest Natl Pk
- Site of Philippine heroism
- Site of Phillips U
- Site of Phillips University
- Site of Piglet's house
- Site of Pizarro's tomb
- Site of plain rain
- Site of Plato's Academy
- Site of Plaza del Oriente
- Site of plenty?
- Site of Port-au-Prince
- Site of Potomac State College
- Site of Pres Jackson's grave
- Site of Presidential cottage
- Site of Prince Don Juan's tomb
- Site of pro football's Hall of Fame
- Site of proposed new Hudson River bridge
- Site of protein synthesis
- Site of Proving Ground of U S
- Site of public hangings
- Site of Puget Sound navy yard
- Site of Punjab University
- Site of Put-In Bay
- Site of pyramids and Sphinx
- Site of Pythian games
- Site of Queen Mumtaz Mahal's tomb
- Site of Queen's University
- Site of Queens
- Site of Qum
- Site of race course in Surrey
- Site of Rainbow Falls
- Site of rainiest district in the world
- Site of Ralph Waldo Emerson's "shot heard round the world"
- Site of raw material?
- Site of recent conclave of Asiatic nations
- Site of recent conference
- Site of recent economic woes
- Site of recent protests by Tibetan separatists
- Site of recent space probe
- Site of Red Square
- Site of reference copies of the Nixon White House tapes
- Site of refinement
- Site of regular slopping
- Site of rejuvenation
- Site of replicas of the Statue of Liberty and the Eiffel Tower
- Site of residential relaxation
- Site of Revolutionary War victory
- Site of rites
- Site of rival of 10 Across
- Site of road to Mandalay
- Site of Robert E Lee's last victory
- Site of robot bomb-firing platforms
- Site of Rocca Maggiore castle
- Site of rods and cones
- Site of Roman games
- Site of Roman ruins
- Site of Roman ruins in NE Italy
- Site of Rosario and Córdoba
- Site of Royal Botanic Gardens
- Site of Rudolf V's imprisonment
- Site of ruins of ancient city, near Athens
- Site of Russell Sage College
- Site of Russian coal basin
- Site of S A C's headquarters
- Site of SMU
- Site of Saguaro National Park
- Site of Sam Houston victory
- Site of Samson's slaughter
- Site of San Nicola church
- Site of Santa sightings
- Site of Saxon defeat: 1066
- Site of Schindler's factory
- Site of Schliemann's dig
- Site of Schweitzer's hospital
- Site of scores of baseball players?
- Site of Seal Harbor
- Site of seating?
- Site of semicircular canals
- Site of separation anxiety?
- Site of Sergeant York's heroics
- Site of seven British Opens
- Site of several kibbutzim
- Site of several WWI battles
- Site of Shah Jahan's famous tomb
- Site of Shah Jahan's memorial
- Site of Shah Jahan's monument
- Site of Shah Jahan's Red Fort
- Site of short-lived castles
- Site of Shwe Dagon Pagoda
- Site of Simón Bolívar Airport
- Site of sites
- Site of Six Flags Over Georgia
- Site of Skoda arms works
- Site of slides and swings
- Site of slippage both geographically and in this puzzle