Green labyrinth formed by a karstic maze hidden in a preserved oak forest.

A museum dedicated to one of Paris’s most famous residents, tucked into a corner of one of the city’s most famous squares.

The Church of the Annunciation was carved into the face of a cliff, just like the rest of the town of Haute-Isle.

Hundreds of prehistoric stones, arranged in perfect lines in a French field.

The 10-foot-tall vegetables belong to Michigan’s first food rescue program.

These gardens recreate unique and endangered Michigan habitats.

A watercolor recreation of a famous fresco unearthed at Pompeii.

The whole world in one water tank.

A museum dedicated to Latvian history in the heart of Maryland.

A curious collection of oddities including a lock of Alexander Hamilton's hair and Harry Houdini's ouija board.

A historic coal mine that doubles as a museum and tourist attraction.

The "mysteries" of this quintessential roadside oddity were almost destroyed by neglect but were saved by fans of kitschy wonder.

Pennsylvania's own Roswell-style UFO mystery.

Garden dedicated to native carnivorous plants and site of huge flytrap heist.

A permanent outdoor art installation made up of more than 100 mushroom-shaped lights.

These strange large stones served as a campsite and lookout post for generations of Native Americans.

North Carolina's only restored fort from the French and Indian War.

Trace the history of writing at this unusual North Carolina destination.

A retired tobacco farmer's pet project turned into a sturdy miniature city.

A throwback to 1980's gaming nostalgia.

This war hero's old shop remembers the fine line between medicine and quackery during the Revolutionary War.

The location where the American Revolution ended.

These trees are living witnesses to events that inspired poet Walt Whitman’s service during the American Civil War.

An enormous warehouse filled with parade floats collected from over 50 years of patriotic celebrations.