The only National Monument ever to go missing for nearly 50 years then resurface in a dump.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

Try not to get slimed in Tribeca.

Manhattan's lighthouse, erected at the insistence of the unsinkable Molly Brown.

Unrepaired walls from a 1920 anarchist bomb attack.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

A fitting attraction for the corn capital of the world.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

One of America's first dinosaur parks gives a window into Depression-era paleontology.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

The "lovely red Vega" of the legendary record-settling pilot.

The remains of Martha, the last known passenger pigeon, serve as a tool to educate about conservation.

A heroic pigeon that, through a barrage of gunfire, delivered a message that saved over 100 lives in World War I.

A building so large that it has its own weather.

This abandoned NASA launch site is now a memorial to a trio of astronauts who were killed there.

Experience a charming 1930's version of "infotainment."

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

A former plague hospital turned medical museum.

The works of poetry's biggest names grace the walls of the city of Leiden, all carefully painted by hand.