You’ve undoubtedly heard talk of building a wall along the southern border of the U.S. While the effectiveness of a wall is debatable in the context of the 21st century, the topic calls to mind some famous walls built throughout human history. One of the best things about travel is it gives us the chance to reflect on where we are, where we’ve come from and where we’re going. Though the walls listed below are no longer used for their original purposes, they still hold great significance as symbols of heritage and a past that should not be forgotten. They remind us that boundaries divide, while travel unites.

The excitement of March Madness has come and gone, but now that it’s safe to go outside again, the spring sports calendar is warming up. Even if you can’t make it this year, these are dream items to stick on your bucket list and resurrect each time the flowers start blooming again.

 It’s a long way until next St. Patrick’s Day, but if you still have some partying left in you after the holiday, get yourself to the Emerald Isle for an authentic Irish cultural experience. With so many regions worth checking out, Ireland is best explored by car, either driving yourself or, better yet, with a driver-guide. Fly into Dublin in the east or Shannon in the west -- preclearing U.S. customs at either airport on the way home -- and circumnavigate the island for an enchanting journey through the land of St. Patrick.

Depending on where you live, it might not yet be evident, but it is officially spring in the Northern Hemisphere. Soon enough, birdsongs will fill the air and everything will be in blossom. While there is an abundance of festivals celebrating the renaissance of greenery, these places’ blooms are among the best.

Some of my most memorable trips have been those to places where I've been able to observe wild animals in their natural habitats. Last year I was fortunate to experience the Galapagos Islands, Tanzania, South Africa and Antarctica.