Your own personal yellow submarine

Ransom Riggs

If Elvis' infamous air-conditioned doghouse was considered the height of excess in the 1960s, the insane luxuries we have at our fingertips today make Elvis look like nothin' but a hound dog. Case in point: personal submarines. I only recently discovered their existence, after two friends returned from their Bahamas honeymoon with pictures and stories of such craft (pictured). I was instantly both appalled and jealous -- who ever heard of such a thing? Wait, I wanna do that! Turns out that their "submarines" are actually known as "breathing observation bubbles," and are rather limited compared to full-on submarines, which, yes, you can buy -- or build -- yourself. To wit:

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