A little lighthouse in New York City, surrounded by mysterious stories of insanity-driven construction.

Neoclassical bank designed by NY architects Helmle & Huberty.

The massive, original Colgate Clock is mounted on a defunct factory building that was once a prison.

The Midwestern United States' tribute to Michelangelo is a foam statue sprayed with gaudy gold paint.

This hidden jockey “walk of fame” celebrates the winning riders of the Kentucky Derby.

The oldest operating Mississippi River–style steamboat still navigates the Ohio River.

A ceramic-tiled room at the Seelbach Hotel said to have secret tunnels used by Al Capone and a crowd that helped inspire F. Scott Fitzgerald's 'The Great Gatsby.'

Ralph Waldo Emerson spent two years living here decades before it became a Frederick Law Olmsted-designed park.

The often-overlooked ruins of one of the first buildings designed by famous landscape architect Frederick Olmsted.

The bears may be gone, but their old cages can still be found.

Underneath the Serapeum ruins lies a dark passage with nooks for books, the lesser-known “sister” to the famous ancient library.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

A tunnel that brings more than a century of history to life from the deepest parts of the Niagara Gorge.

Amid skyscrapers and traffic exists this unique aquatic ecosystem.

Once considered a marvel of engineering, this 107-mile canal played an integral role in building New York City.

This half-ton piece of the Alps sits at the base of the CN Tower.

A glimpse at Walt Disney's vision for a "community of tomorrow," in miniature.

Once featuring over 60 miniature replicas of famous Chinese locations, the Splendid China theme park was completely abandoned and is now mostly rubble.

This fountain was designed to honor the man who helped bring water to Barcelona.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

A small cave hidden deep within the Jenny Jump State Forest.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

Cryptic messages embedded in the New York City sidewalk.