May 22, 2015; 4:12 AM ET
Temperatures will remain on a roller coaster ride around Philadelphia in the days leading up to Memorial Day. more >
Pleasant this weekend
The United Nations Educational, Scientific and Cultural Organization has over 1,000 locations on its prestigious World Heritage list -- here are picks for the most stunning sites.
This sand desert at the heart of the Arabian Peninsula ranks as one of the least explored places on Earth -- but there is a way to visit.