The super-rich are installing doomsday bunkers in their droves. The prepping craze took off during the COVID-19 pandemic and has reached fever pitch amid the war in Ukraine and tensions between China and the West.

Multimillionaires and billionaires are going all-out: for example, US firm SAFE is currently building an island fortress bunker for an unnamed business tycoon that will come complete with a flammable moat and water cannons that can shoot down hostile aircraft.

But for real lovers of luxury, there's only one choice. The L'Heritage bunker from Switzerland's Oppidum spans 12,380 square feet (1,150m²) and is a sumptuous five-bedroom sanctuary that resembles a five-star hotel suite more than it does an end-of-days hideaway.

It starts from $60 million (£47m), though with optional extras such as a pool, inner garden, cinema, gym, and art gallery all available, the typical cost comes in at $100 million (£78m).

What the super-rich are buying in 2024, and how much they're paying