By Cat DiStasio

While architecture on land strives ever higher, designers in wetter parts of the world are finding new ways to build beneath the waves. Underwater buildings aren't exactly common -- partly thanks to their enormous expense -- but there are a few stellar examples of submerged structures that demonstrate how a trend like this could really take off. From the world's largest underwater restaurant in the Maldives to a community of luxury floating condos in Dubai that put beachfront property to shame, undersea buildings illustrate what can be done when we fuse technology with architecture.