Central America's deepest lake is actually a volcanic caldera, surrounded by three volcanoes.

For this chef, an active volcano is his oven.

Hidden deep in the Guatemalan jungle is a turquoise paradise of natural pools, caves, and waterfalls.

No one is sure if the world's fourth-largest diamond had been found in a rubbish heap or was pawned by Napoleon's mom.

An opulent monument built for a duke who donated his entire fortune to the city of Geneva.

One of the most historical literary characters continues to stroll his hometown.

This colorful but controversial ceiling has been likened to a 21st-century Sistine Chapel.

Go inside to really appreciate this 500-year-old technological masterpiece.

The train platform where Jews were sent to concentration camps is now preserved as a Holocaust memorial.

One of the world’s smallest bars, just 13 square feet, is brimming with speakeasy flair.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

A small sanctuary carved into the mountainside near the tallest point in continental Portugal.

A devasting 2020 fire left this historic seminary in ruins.

After the owner of this Art Nouveau home died, it was turned into a museum displaying a lifetime dedicated to art.

A naturally occurring amphitheater carved by erosion into the mountainside.

This enigmatic Roman tower lurks just outside Belmonte.

A glacial valley filled with silver beech trees in the mountains of Portugal.

This chapel is the site of a yearly pilgrimage that originated during the Middle Ages.

The ancient sauropod tracks found in this former quarry are some of the largest in the world.

An 11th-century medieval castle cascades over the town of Numão.

As the highest point in the Mid-Atlantic range this stratovolcano offers spectacular views.

A lush oasis full of vibrant plants and striking geometric displays.

Portugal's National Pantheon has a history of curses, collapses and financial problems.