Viking 1
Viking 1 was the first of two spacecraft (along with "Viking 2") sent to Mars as part of NASA's Viking program. On July 20, 1976, it became the second spacecraft to soft-land on Mars, and the first soft lander to successfully perform its mission. (The first spacecraft to soft-land on Mars was the Soviet Union's Mars 3 on December 2, 1971, which stopped transmitting after 14.5 seconds.) "Viking 1" held the record for the longest Mars surface mission of days (over 6¼ years) or Martian solar days, until that record was broken by "Opportunity" on May 19, 2010.
Mars landing
The Mars Science Laboratory (MSL) (and Curiosity rover), launched in November 2011, landed on Aeolis Palus, between Peace Vallis and Aeolis Mons ("Mount Sharp"), in Gale Crater on Mars on August 6, 2012, 05:17 UTC. The landing site was in "Quad 51" ("Yellowknife") of "Aeolis Palus" near the base of "Aeolis Mons". The landing site was less than from the center of the rover's planned target site after a journey. NASA named the landing site "Bradbury Landing", in honor of author Ray Bradbury, on August 22, 2012.