If you want to explore the deep, there can be few finer ways of doing it than on the €4.4m U-Boat Worx C-Researcher personal submarine.

The C-Researcher range from U-Boat Worx is one of the deepest diving personal submarines on the market.

Depending on which specific model you opt for, it can take three occupants up to 3,000 metres (almost 2 miles!) beneath the surface at speeds of up to 3 knots.
…
Read more