The 400-year-old remains of the samurai invasion of Korea.

An 11th-century mountaintop fortress that played a crucial role in Italy's papal wars is now a vacation rental.

This network of narrow, medieval passages has the most delightful name.

One of the shortest streets in York has an especially odd name.

The little-known second castle that William the Conqueror built in York.

Follow the original medieval paths that wind through this intriguing section of the city.

A gruesome and mysterious ancient sculpture of a pagan deity from the Roman occupation of Celtic Britain.

This ancient altar emerges from the thick forests to reveal the mysteries of Etruscan sacrificial rituals.

This ancient jade mask depicting the Zapotec bat god was found in the ruins of the pyramids of Monte Alban.

This partially reconstructed Aztec pyramid gives a glimpse of what its larger counterparts would have looked like.

Dating back to the second century, vestiges of prehispanic mural paintings are found in this underground palace.

A striking depiction of Teotihuacan's mysterious "Spider Woman."

This popular pilgrimage site offers a hole filled with holy healing dirt.

The building stands within a quiet, postcard-perfect New Mexico village.

A medieval castle in the middle of rural Texas.

This highest peak in New Mexico is named after an explorer who had a habit of lending his moniker to peaks.

One man’s passion for gas stations is on display along the Rio Grande in northern New Mexico.

Reproductions of nine banned oil paintings coyly hidden behind a curtain in a New Mexico conference room.

A multi-storied adobe complex has been inhabited for more than a thousand years.

Whimsical sculptures and caves chiseled by nature over the millennia.

This great stone guardian of the forest is a relic from the land's volatile volcanic past.

These hellish-looking cliffs in the Canadian Arctic have been burning for centuries.

This towering volcanic plug stands out among the dramatic formations that dot this otherworldly desert valley.

It's believed King John of England stayed at this 13th-century castle before riding off to sign the Magna Carta.