When we recommend sun-soaked, warm-weather destinations - say, on the beach or in the jungle – the daily temperature usually tops off at 90 F. Anything above this is just unpleasant. Some places, however, are worth seeking out even though they're so blistering hot you'll have to prepare yourself to be uncomfortable. For these 10 worthy hot spots – with average temperatures well over 100 F – bring lots of water, sunscreen, a good hat, and, if you can help it, have a room with air conditioning.
Yellowstone National Park
The temperature in Yellowstone is fairly comfortable during the summer and cold during the winter, but the water that shoots out of the park's spectacular geysers is piping hot, reaching about 400 F underground. It's closer to 200 F when it spews, but that's still more than hot enough to cause third-degree burns. There's a tragic true story about a man dying after trying to save a dog from Fountain Paint Pot, a beautiful hot spring named for swirling colors caused by oxidation. Keep your dog on a leash when you make the trip.
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