Call it "environmental disaster tourism." Crystal Cruises is selling an Arctic cruise on the ship Crystal Serenity, which sounds more like a tea sold to tourists in Santa Fe than an ocean-going vessel. Crystal Serenity weighs over 68,000 tons, is 13 decks tall, and can house 1,070 customers. Bargain-basement book-now prices run just shy of $20,000, though more discerning disaster-watchers can pay $44,000 for a penthouse suite on the inaugural northwest passage trip. The cruise will leave from Alaska, travel along the waterways north of the Arctic Circle that were historically too filled with ice for safe travel by boat, visit Greenland, and then arrive in New York 32 days later.