The world's newest astronomical clock is also its most accurate.

Sunset-colored dunes of volcanic ash make taking a poor photo impossible.

The 16th-century church was kept in its ruined state as a reminder of the casualties of World War I.

A creepy sculpture of a decapitated head invites viewers to see St. Louis through its empty eyes.

A public urinal so pretty, it was declared a national monument.

The home of pigs, snakes, chameleons, and the alleged largest bunny in the United States.

A clone of a cloned tree that was so important it allegedly had its own guards.

A pride of the state, this working museum crafts pottery mosaics in the style of Pennsylvania's earliest European settlers.

Dozens of lights dangle from the branches of what may be the brightest tree in Los Angeles.

This graveyard contains markers and monuments dedicated to some of the darkest chapters in Washington's history.

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

A fantastic array of trays and cables once whisked books over to the Capitol at 600 feet per minute.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

The remains of a 1st-century aristocratic Roman town house featuring beautiful well-preserved mosaics.

Every hour the doors open to reenact the legend of the heroic mayor who saved his town by drinking a gallon of wine.

Europe's largest collection of matchbox designs is a fascinating exploration of the cultural history of the world.

A stunning two-story timepiece within a medieval Brick Gothic church.

A mysterious light floating in the trees of Arkansas may be a piezoelectric effect.

A bronze replica of half-consumed salt lick honors a quirky town tradition.

This golfball sized platinum iridium cylinder is the official starting point for all national weight calibrations

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

This beautiful example of Victorian engineering is the oldest water-balanced funicular anywhere in the world.

The museum calls itself the "National Museum of the Paranormal" and is full of eerie oddities.