In March 2005 I made three friends of mine stop by at Messel when we had a three day trip to Frankfurt and surroundings. Well, it was a nice sunny day and we could go the whole way (information tableaus about the Messel Pit Fossil Site along the way) to a platform from where we could see the pit. The info tableaus were quite good, but the pit itself was kind of disappointing. Unfortunately the museum wasn't open as we've been there on a weekday during winterbreak (until the end of March, from 1st April on it's also opened on various weekdays). All in all the pit itself isn't worth a visit, but the museum shall be nice.