A serene memorial that honors the adventurous spirits of climbers who lost their lives in the High Tatras.

This network of conjoined cellars was riddled with traps and supposedly allowed the townspeople to pretend their homes were deserted.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Bullet holes in the church wall are a reminder of the violence that followed the assassination of a high-ranking Nazi officer.

A quasi-futuristic roof sits atop a medieval Bohemian monastery damaged during World War II.

The largest and best-preserved rotunda in Prague.

Before serving as James Bond's Casino Royale, this Victorian-era spa catered to the world's elite.

It would take you approximately an hour and a half to walk to the end of Mexico's largest pier.

A small site dedicated to the memory of a local leader and the search for peace.

It might look like a doghouse, but this small structure was actually built to house a spirit from Maya mythology.

At least seven hues of blue and turquoise make this freshwater lagoon unique.

This series of paintings celebrate a locally beloved snail species.

This city's cultural center is in a restored Spanish colonial home from the 1800s.

These azure waters were thought to lead to the Mayan Underworld.

Every equinox this Maya pyramid puts on a spooky ancient light show.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Iconic red and white plaques show the creative names invented to navigate the city streets.

This lurid German fountain plots the sad course of marriage from dating to death.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

An ornate sculpture of an ox in repose marks the former entrance to Nuremberg's medieval meat market, which was destroyed during World War II.

This unusual island has a winding sand bridge that only appears at low tide.

Bohol's unusually shaped hills turn brown in the summer months.

A patch of Philippines forest devoted to saving the lives of an emotionally sensitive species of googly-eyed primates.