From underwater reefs to underwater museums to underwater hotels, these attractions below the water's surface are once-in-a-lifetime travel opportunities. Text by QMI Agency Museo Subacuático de Arte, Mexico: Around 450 life-size sculptures by artist Jason de Caires Taylor rest on the bottom of the Caribbean Sea near Cancun. A perfect place to snorkel and take in some interesting sculptures of humans, the goal of the underwater museum is to draw tourists away from sensitive coral reefs to a sturdier attraction that can handle increased tourist visits. (AFP PHOTO/Jason deCaires Taylor)