This hilltop fort is a dark holdover from one of Latin America's bloodiest dictatorships.

Housed in a 20th-century prison, this small museum recounts local Nicaraguan myths.

This sinkhole in the Arizona desert is filled with carbonated, arsenic-rich water

Known as one of the most famous parks in Honduras.

The highest point in Washington state is a volcano covered in glaciers.

This niche museum devoted to ancient religious artifacts is shaped like the very thing it displays.

Legend tells how a Spanish soldier disappeared from this isolated sentry box without a trace.

A little-known hall almost completely covered in art by the beloved local painter.

These sacred Mesoamerican ruins feature peculiar petroglyphs hidden in the stones.

A lover's walk between hilltop towns, decorated with graffiti love notes.

The geoglyph once sported a glass bottle eye.

Death rituals and sacrifice inside a Peruvian megalith.

This stone complex marks the urban center of a lost civilization.

The first car-centric shopping plaza in the U.S. brought a little bit of Spain to downtown Kansas City.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

These enormous, stern-faced statues greet visitors with lanterns, and sometimes costumes.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

The site of a legendary battle immortalized in medieval literature.

For 32 years the famous Ringling Bros circus troupe spent winters in this sunny spot in Florida.

Famously misunderstood wonder of the ancient world

The largest stone circle in the world has ended up bringing up more questions than it has answered.

This enormous banquet-themed artwork honors over 1,000 notable women throughout history.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

Two stone columns flank the grand Venice square, but there were supposed to be three.