1. Vancouver, Canada
What to See: Kitsilano ("Kits") Beach (especially during the summer), Granville Island Public Market year-round, and Stanley Park whenever you feel like exploring.
What's Nearby: Tacoma, Washington, to Vancouver is about 4.5 hours, and Seattle to Vancouver is about 3.5 hours.
2. Tijuana, Mexico
What to See: The Centro Cultural Tijuana hosts some of the finest arts and culture in miles, and the Playas de Tijuana (the beach) can't be beat during the summer.
What's Nearby: San Diego is about an hour away, Palm Springs is about a three-hour drive, and it'll take about four hours to get there from most parts of Los Angeles.
3. Niagara Falls, Canada
What to See: You can't go wrong with seeing Niagara Falls in Niagara Falls — no matter what time of year. But there's also Clifton Hill, a whole neighborhood full of exciting things like the Skywheel, dinosaur- and wizard-themed miniature golf courses, and a roller coaster.
What's Nearby: Besides Niagara Falls, New York, it'll take less than an hour to get there from Buffalo, less than two hours from Rochester, and about three hours from Syracuse.
4. Matamoros, Mexico
What to See: The Charro Days Festival in later February is a delight, and the Museo de Arte Contemporáneo de Tamaulipas features a heavy mix of modern and folk art.
What's Nearby: It's right across the border from Brownsville, Texas, but farther jaunts include an over three-hour drive from Laredo (if Nuevo Laredo, Mexico, isn't in the cards for the day) or an under three-hour drive from Corpus Christi.
5. Montreal, Canada
What to See: See?! You need the poutine, the coffee, the bagels, the seafood, the foie gras... OK, fine, the Parc du Mont-Royal has delightful views as well. When you're not eating.
What's Nearby: Burlington, Vermont, is about two hours away, and Watertown, New York, is about a three-hour jaunt.
6. Monterrey, Mexico
What to See: The views throughout the city cannot be beat, but it truly outdid itself when it converted old steel factory grounds into Parque Fundidora.
What's Nearby: It's about a three-hour drive from either McAllen or Laredo, Texas.
7. Winnipeg, Canada
What to See: Assiniboine Park is a local favorite throughout the year, and The Forks has nearly everything you could imagine.
What's Nearby: It'll take about 3.5 hours to get there from Fargo, North Dakota, and about 2.5 hours from Grand Forks, North Dakota.
8. Chihuahua, Mexico
What to See: Presa El Rejón has views for days, and Palacio del Gobierno has murals that need to be seen to be believed.
What's Nearby: Both Marfa and El Paso, Texas, are about four hours away.
9. Québec City, Canada
What to See: The Carnaval de Québec in late January/early February features snow sculptures, events, and almost too much fun. But if you're not there in winter, Plaines d'Abraham boasts breathtaking views all year.
What's Nearby: Burlington, Vermont, is about 3.5 hours away, while Augusta and Bangor, Maine, are about 4.5 hours away.
10. Nogales, Mexico
What to See: During any season, Nogales has the best authentic Mexican food, drink, and music you crave.
What's Nearby: Tucson, Arizona, is about a 1.5-hour drive, and you can get there in about three hours from Phoenix.
Thanks to T-Mobile's Mobile Without Borders, you won't get charged extra for calling or texting anywhere in North America...which means you're pretty much out of day-trip excuses.