Our Central America animal for May is tripled: three iguanas sunning themselves on a wall in Ambergris Caye, Belize. Iguanas are common all over Central America. The mellow lizards are totally harmless, but can be quite huge!

• More photos of Ambergris Caye, Belize
• Belize wildlife photos

Crossing the border between Central America counties can range from a breeze, to a hassle, to a major headache. But, borders are often an inescapable part of Central America travel.

We've compiled a list of all the Central America border crossings, from Belize to Panama and in between. Before crossing any border, make sure your passport is up-to-date, and you have cash in the correct currency to pay any entrance or exit fees.

The oldest known Mayan calendar was recently found in Guatemala, according to Discovery News. And contrary to popular belief, the Mayan calender isn't a countdown ending this December:

"'The Mayan calendar is going to keep going for billions, trillions, octillions of years into the future,' said archaeologist David Stuart of the University of Texas, who worked to decipher the glyphs. "Numbers we can't even wrap our heads around.'"

The calendar was discovered by Boston University researchers in the ancient Maya city of Xultun in northeast Guatemala. While Xultun was first discovered in 1915, researchers claim less than 0.1 percent has been explored.

• More Mayan ruins in Central America

Puerto Viejo, Costa Rica is the top destination for travelers on Costa Rica's Caribbean coast. However, the beach is still off the radar for many Costa Rican travelers, who still head to Pacific coast beaches in much higher numbers.

Me, though, I prefer the Caribbean. The laid-back, funky vibe and cultural melting pot aspect is reminiscent of Belize and Honduras's Bay islands, while remaining distinctly Costa Rican. Oh, and the sheer beauty also helps...

• Photos of Puerto Viejo, Costa Rica