From their site:

"Welcome to 360 Cities

the World’s fastest-growing Virtual Reality network, now with more than 50 cities and over 6,000 virtual reality panoramas.

Our goal is to show you the most interesting places in the world from the most interesting perspectives. Whether you are planning a trip, looking for ideas, or simply 'armchair traveling', there is no better place for Virtual Travel than with 360cities. From seeing the sights and landmarks, to looking for a hotel, restaurant, or a nightlife destination, we have what you need.