The new U.S. proposal contains no specific enforcement mechanism or penalties for limiting tourist operations. But it would require signatories to the pact to ensure that Antarctic tour operators bar ships with more than 500 passengers from landing sites, restrict landings to one vessel at a time per site and limit passengers on shore to 100 at a time. It would mandate a minimum of one guide for every 20 tourists while ashore, according to the documents.

It used to be the signature sound of gambling: the clacking of coins spilling into metal trays on slot machines. But newer electronic machines that spit paper vouchers or credit winnings to cards now emit only canned noise.

Investors plan to set up a hotel catering exclusively to nudists in the picturesque Black Forest town of Freudenstadt, which incidentally translates as Town of Joys. Guests will be required to remove their clothes at the entrance and must be naked at all times while on the premises