Summarize the following:
While the idea of showing up at an airport and buying a ticket on the spot may sound fun, it's unrealistic and likely quite expensive. Decide if you want to travel domestically or abroad, and then pick a city, series of cities, or region that you'd like to visit. At this point, you should also consider your financial situation: how long can you afford to travel for? International travel generally costs more than domestic, although frugal decisions while abroad can save substantial money. For example, if you're interested in touring the American northwest, you could spend a full week in a large city like Seattle, or you could divide your time between several cities, like Seattle, Tacoma, and Portland. If you're traveling abroad, you may need to obtain a travel visa for the country you're visiting. These can take some time to obtain. Contact the State Department of the country you're planning to visit to find out if you need a travel visa and how to apply for this document. Spontaneous travel can be successful and fun whether or not you're part of a group (or a pair), but solo travelers typically need to be more mindful of their own safety. If you're traveling alone, make sure to book a hotel with a 24-hour front desk so you can check in late, and stay in open, public places at night. It's also smart to regularly keep in touch with a friend or family member at home, who knows your travel itinerary. Whether you're traveling with a group or alone, avoid wearing flashy jewelry or clothing, and each member of your party should carry more than one form of official identification (e.g. a passport and a driver's license). Staying in the middle of a city or region will give you access to plenty of cultural and local events and places like theaters, concert venues, restaurants and bars, museums, and other places to visit. Once you've unpacked your bags in a town, plan to stay a few days; you can leave your schedule open and spontaneously visit areas of interest. If you decide to move between several cities or regions on your trip, try to set yourself up in a central location in each successive destination. If you were to stay on the outskirts of a city, in a rural area, or in a small town, for example, it would be much harder to find locations to spontaneously travel to and visit. Nothing will slow down a spontaneous trip like copious amounts of luggage. Unless you have specific reasons for needing to bring many bagsfor example, you're traveling to a very cold climate or need to bring technological equipment with youtry to travel with only one bag. Make sure it's a bag that fits in the overhead compartment of an airplane, so you don't have to check bags for a spontaneous last-minute flight. Bring the essential clothing, footwear, and nothing extraneous. Having only a single bag will enable you to move quickly from one city or region to another, and you'll be able to use any type of transportation that you please: plane, train, renting a car or Uber, hitchhiking, bicycle, or just walking.

Summary:
Decide where you'd like to travel. Decide if you're traveling alone or with others. Choose lodging in a central location. Travel light.