Despite the name, this 16th-century structure in Galway wasn't built by the Spanish.

The last remaining vestige of a popular 1999 public art display.

Color-coded signs direct drivers on a network of routes designed to avoid Pittsburgh traffic.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

The house where Lincoln drafted the Emancipation Proclamation.

In 2010, Nicolas Cage purchased two plots in this cemetery using one to construct this strange pyramid mausoleum.

This historic vessel on display in Massachusetts made a dozen scientific expeditions into the Arctic.

Once a giant oak that served as the region's post office.

This picturesque beacon was built to keep boats safe shortly after the Civil War.

The colonial home of Paul Revere during the American Revolution.

Situated in a bustling intersection, this "mobile" monument that honors local veterans from five different wars has moved several times but appears to have found its final resting place.

An overlooked memorial honoring the local Washington residents who died in World War I.

This unique museum cafeteria showcases the history and regional diversity of African American cuisine.

Perhaps the most scandalous statue of America's first president.

A much-maligned monument to teetotalism.

One of the most influential presidents in U.S. history wanted only this plain, elegant monument as his lasting memorial.

A glimpse of the Pacific Northwest‘s indigenous culture in Washington, D.C.

An echo chamber with a waterfall wrapped around its base at the Embassy of Canada in Washington, D.C.

A spectacular tribute to statesman and philanthropist Andrew Mellon.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

There aren't too many operational funiculars around, but Pittsburgh has two!

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.