As a top-five vacation spot in the U.S., San Diego is the quintessential beach ... cave opens up to captivating views of the Pacific Ocean, but guests are restricted from snorkeling or swimming ...

Near the beach resort of Tulum, the group found that the cave system known as Sac Actun, once measured at 263 km (163 miles), communicated with the 83 km- (52 km-) Dos Ojos system, the GAM said in ...

The beach's popularity means that you're likely to encounter crowds (especially on days when cruise ships are in Montego Bay's port) and high food prices. A trip to Doctor's Cave means you'll have ...