Hotel designed around a 16th century Mexican bullring.

The spectacular subterranean collection includes dazzling minerals, including a piece of "kryptonite."

This grand yet little-visited tomb seems almost carved into the hill it sits on.

Mexico's largest collection of masks is found in the ruins of an abandoned convent.

This museum tells the history of Day of the Dead sugar sculptures.

Stained glass windows bathe this botanical garden in cosmic light.

The striking and little-touristed ruins of an ancient city destroyed and rebuilt by the Aztecs.

The winter home of millions of migrating monarch butterflies.

It was dubbed the "Garden of Plates" because it's covered in pieces of discarded dishes.

A hidden room within the church displays an amazing collection of old choir books.

The remains of a centuries-old water system that inspired local legends of secret tunnels.

This historic Mexican convent is home to a tree that grows crucifix-like thorns.

This eerily opulent residential museum is home to a haunting local legend.

This baroque wonder is filled with a trove of artistic treasures.

This shrine commemorates the site of the first known Catholic mass in the United States.

Staves, storm-calling, and of course, necropants.

The ruins of a rural church and a statue of Archangel Gabriel are tucked away in Majella National Park.

A 14th-century abbey founded by a forest-loving order of monks now sits in the center of a pristine nature preserve.

Beautifully decorated tarot cards from the Middle Ages.

This site marks the oldest known settlement in Campania, inhabited around 9,000 years ago.

For centuries, this town's hot springs have been embraced by rich and poor—and even by Popes.

This small hermitage is located along an ancient route that connected the Tiber and Rieti valleys.

This beautiful Romanesque church preserves stunning medieval frescoes and the excavations of a Roman market town.

The ruins of a thousand-year-old hermitage are tucked away deep in the sloping forests of Albano Lake.