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

More than 5,000 artifacts donated by the people of the city, plus a room entirely devoted to the band U2.

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

The enchanting archway is the only surviving portal into Dublin's lost medieval wall.

One of Ireland's most infamous prisons for rebels including men, women and children.

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

An 80-year-old plane tree is devouring an iron bench at Ireland's oldest law school.

A hidden architectural treasure in New York's Brooklyn.

This enormous banquet-themed artwork honors over 1,000 notable women throughout history.

This secluded ruin was once a home for exotic plants.

The first piece of public art dedicated to LGBT rights.

19th century cemetery hidden in Brooklyn's Prospect Park.

Little Red Lighthouse under the George Washington Bridge.

The most confusing clock in New York.

A modern zoetrope on the New York City subway.

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

In its day this historic fort held 100 cannons pointed in almost every direction to protect New York.

New York City's only radical feminist independent bookstore.

This outdoor gallery of graffiti-covered walls pays homage to the past, present, and possible future of street art.

A no-frills cinephile haven known for showing offbeat, underseen films.

This small, hidden cove is home to abandoned boats.

A whimsical, but often overlooked clock in Park Avenue.

This abandoned seaside fortress is now simply an imposing ruin being taken back by nature.

A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future.