Forget flying by private jet or cruising the world on a superyacht: luxury rail travel is fast becoming the most desirable mode of transport for the richest 1%. Enticed by its eco credentials, not to mention the promise of romance, opulence, and adventure that traveling by train offers, the mega-moneyed are going all out for going all aboard.

From splurging on trips on the Venice Simplon-Orient-Express to chartering whole trains, read on to explore the most wildly expensive rail experiences, charters, and private trains – including the jaw-dropping "palace on rails" that's worth $350 million.

We've ranked these rail experiences by cost per night per person based on double occupancy where data is available. All dollar amounts in US dollars.

Climb On Board The World's Most Luxurious Trains Only The Wealthy Can Afford