Staying in a beautifully restored historic home or a state-of-the-art penthouse used to be the preserve of the super-rich or well connected. But Airbnb, the peer-to-peer online vacation rental site, has unlocked the doors to some spectacular properties across America. Here's our pick of the best Airbnbs in every state and DC. Remember to check state travel advisories, each property's coronavirus protocols and safety advice before you go.