A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

One man's swirling six-acre monument of stone.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

An Irish town has built a statue to a silent film actor simply thanks to the holidays he once spent there.

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

The modern birthplace of Irish freedom.

Amidst the bustling streets of Dublin, there is a hushed garden that is dedicated to "All those who gave their lives in the cause of Irish Freedom."

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

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

Every year model trains zip through a miniature New York City that's now 150 landmarks strong.

New York's southernmost subway station is whimsically wavy.

The longest continuous underwater road in North America was built at the insistence of Franklin Roosevelt.

Hidden inside one of the world's most well-visited zoos is a secret plaque promising eternal life.

Beautiful mosaics cover the first stations opened on New York City's newest subway line.

The most confusing clock in New York.

Lie in a hammock where George Washington stood.

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

One of only two commuter aerial tramways in the United States.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

A crumbling hospital from the 1850s on Roosevelt Island.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.