The world got you down? Wish you could escape to somewhere calm, beautiful, and quiet? No problem! Just hop into one of these amazing one-man submersibles, take a deep breath, and propel yourself down into the deep blue sea. Serenity awaits.

This is the Nordenfelt I, 1884 brainchild of Swedish inventor and industrialist Thorsten Nordenfelt 1884

Photo: Wikimedia Commons

One of the two Resurgam, an early Victorian submarine designed and built in Britain by Reverend George Garrett in 1878-79. The Resurgam I was a hand powered, one-man submersible; the Resurgam II had a three-man crew, and was steam-powered.

Photo: Garrett/Henry Guttmann/Getty Images

A submarine motor car, invented by Michel Andre in 1937.

Horace Abrahams/Fox Photos/Getty Images

The Motorised Submersible Canoe (MSC)—nicknamed 'Sleeping Beauty'—was a British underwater reconnaissance or attack vehicle for a single frogman during World War II.

Photo: National Archives of England, Wales and the UK Government

The Biber, a German midget submarine of the German Navy during the second World War, came armed with two externally mounted torpedoes.

Photo: geni/Wikimedia Commons

The Welman submarine was a WWII one-man British midget submarine developed by the Special Operations Executive, but sadly was not very successful.

Photo: Minewarfare & Clearance Diving Officers' Association

This K-250 one-person submersible was designed by retired US Navy WWII submarine captain George Kittredge in the 1960s.

Photo: Steve

Mikhail Puchkov's homemade personal submarine made a splash in the 1980s.

Photo: Mikhail Puchkov

This is the one-man microsubmersible Mantis, designed by Graham Hawkes, British marine engineer and submarine designer. You might remember it from For Your Eyes Only.

Photo: Osel979/Wikimedia Commons

C-Quester was one of the first mass-produced personal submersibles by the Dutch U-Boat Workx. Production was discontinued in favor of multi-passengers subs.

Photo: U-Boat Workx

Newtsub Deepworker 2000, a single-person submersible by Nuytco Research Ltd.

Photo: NASA Analog

Deep Rover, another single-person submersible by Nuytco Research Ltd.

Photo: T. Kerby/OAR/National Undersea Research Program (NURP); Univ. of Hawaii/NOAA

The Innespace Dolphin prototype personal watercraft, which can ride on top of, leap out of, or dive under the water' surface.

Photo: Scott Olson/Getty Images

AquaVenture WaterCrafts prototype sub, 2010.

Photo: AquaVenture/Facebook

Virgin Oceanic Expeditions' deep sea submarine, seen here in 2011, is currently still undergoing testing.

Photo: Reed Saxon/AP

James Cameron's Deepsea Challenger made it about as far underwater as you can go.

Photo: Charlie Arneson/Deepsea Challenge Facebook

Omer 8, a human-powered submarine recently built by students of the École de technologie supérieure (School of Higher Technology) in Montreal, Quebec

Photo: Omerets

Top photo: Mikhail Puchkov

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