Conrad International Pool, Istanbul

One luxurious option to escape the sticky summer heat of the city is to take full advantage of the special day-passes and seasonal memberships available at some of the five-star hotels. At the Conrad, as with most deluxe hotels, it's always best to call for information in advance before showing up with swimming togs and a towel. Prices and terms can change without notice. None of the hotel pools have lanes; it's pretty much a swim-for-all. The Conrad's outdoor pool is 77-feet long. Lockers and towels are included in the fee.