TULUM, Mexico — When you’re floating in the balmy, turquoise water, parts of the Quintana Roo coastline still look timeless. Dense tangles of palm trees and shrubs line the soft, sandy beach.

Halfway up the pyramid and you’re already over the tree line, so there’s always a good view. But the best view is from the top. The lush green jungle spans out for miles in front of the pyramid.