We often imagine humanity's future in space, but what about in the unexplored depths of our own planet's oceans? These incredible concept designs offer visions of what our future water world might actually look like.

An undersea city from Out of Time: Designs for the Twentieth-Century Future, 1954

(via Paleo-future)

City under the sea, by Klaus Bürgle, 1964

(via Retro-futurismus)

Undersea Horizons, by Robert McCall

(via futureprobe)

Cyberpunk City by nkabuto

(via nkabuto/DeviantArt)

Atlantis, by BlueRogueVyse

(via BlueRogueVyse/DeviantArt)

Rapture, a city from the BioShock video game series

(via Imgur)

Alien City, by J. Carson

(via Discovery Enterprise)

Anno 2070

(via WallpaperUP)

Underground City, by nkabuto

(via nkabuto/DeviantArt)

Dabu's deep, by NikoKripton

(via NikoKripton/DeviantArt)

Water city by Andrea Susini

(via Digital Art Gallery)

A metropolis by aquarake

(via aquarake/DeviantArt)

Syph, Australia, designed by Arup Biometrics

These jellyfish-inspired specialised structures function as a whole, with some pods being industrial, food producers, energy producers or residential.

(via Brisbane Architecture Blog)