“Twenty years from now you will be more disappointed by the things you didn’t do than by the ones you did do. So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover.”

TravelHaven Destination — Great places to explore solo

For msn.com’s Best Places to Explore Solo slideshow Emily H. Bratcher quoted British explorer Dame Freya Stark: “To awaken quite alone in a strange town is one of the pleasantest sensations in the world.” The slideshow touts seven great places for the solitary traveler. In addition to four super U.S. cities, here are three foreign picks from U.S. News Travel.

Dublin

Pop into any of the city’s pubs and most of its guests will be more than happy to share a pint and some conversation. Plus, Dublin is relatively affordable, despite the exchange rate. And since there are nonstop flights from the United States to Dublin International Airport, getting there is a cinch, too.

Sydney

Aussies regularly travel by themselves, so they won’t miss a beat seeing you do the same. Plentiful hostels offer travelers cheap accommodation, as well as a forum to meet other visitors, and many of the city’s top attractions won’t cost you a dime, such as hiking through Sydney Harbour National Park, swimming at Coogee Beach, and people-watching in Sydney Harbour.

Costa Rica

For a non-urban getaway closer to the equator, why this Central American country known for its lush jungles, picturesque beaches, and exotic wildlife. Here, you can lounge on Nicoya Peninsula‘s powdery sands, hike the fiery Arenal Volcano, or visit one of many national parks. Plus, accommodations are very affordable.