Can safely predict this is one way I'm not going to die

Surely I can't be alone in not knowing (or forgetting?) that tourist trips to more than 3 km under the Atlantic were available?  

Actually, looking at the company's website, it seems they don't exactly sell it as a "tourist trip":

Expeditions will be conducted respectfully and in accordance with NOAA Guidelines for Research Exploration and Salvage of RMS Titanic [Docket No. 000526158–1016–02], and comply with UNESCO guidelines for the preservation of underwater world heritage sites.

Qualified explorers have the opportunity to join the expedition as Mission Specialist crewmembers whose Training and Mission Support Fees underwrite the mission, the participation of the science team, and their own training. Each team of 6 Mission Specialists will join the expedition for a 10-day mission (8 Days at Sea). The entire expedition is comprised of 5 mission legs.

Or is there another tourist venture apart from that?

Anyway, I can't imagine anything worse than being in a tiny, potentially malfunctioning sub at the bottom of the ocean.   Somehow, suffocating in space seems a more attractive option, although I'm not entirely sure why...