Commemorating the planting of trees by the Atlanta chapter of the Concatenated Order of Hoo-Hoo.

This angular brutalist playground turns playtime into modern art time.

Final remnants of the 1895 Cotton States and International Exposition.

Yup, that's where the name came from.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

A statue commemorate Tommie Smith and John Carlos's brave protest at the 1968 Olympics, a watershed moment for civil rights.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

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

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

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.