Lover’s Deep Luxury Submarine, St. Lucia — $175,000
By the loosest of definitions, this qualifies as a hotel, but it happens to be a submarine. You travel, underwater obviously, around the Caribbean islands of Montserrat, Martinique, St. Lucia and Barbados, among others. There’s a staff of three — captain, chef, and personal butler — their accommodations are at the opposite end of the ship to ensure your privacy. Check out the video to get an idea of just what kind of experience you’re in for: