Rare wooden escalators lead deep down into an otherwise staggeringly monotonous tiled tunnel.

Remarkably intact Roman stone fortifications have encircled this Spanish city for centuries.

An accidental trick of light casts the perfect shadow of a pilgrim of the Camino de Santiago against the cathedral wall.

In Midtown Atlanta, tons of marble appears to be devouring a Fiat Panda at this unique art installation.

A slanted tomb honors the faithful, furry companion of the Georgia Tech student body.

This "living building" on Georgia Tech's campus is home to a blueberry orchard, honeybees, and more than 900 solar panels.

The small first-floor apartment where the author wrote her Pulitzer Prize-winning book 'Gone with the Wind.'

One of corporate America's best-kept secrets is also one of the most publicly displayed.

One of the world’s largest collections of paper memorabilia chronicles 4,000 years of papermaking.

A colorful square marks the heart of the city's LGBTQ community.

An underground magnet for ever-changing street art.

The 2,000-year-old pieces of metal are an ancient soldier's military discharge papers.

A whimsical bridge uses saxophones to pay tribute to two great men and the European Union.

A 14th-century fortified keep showcases the masterpieces of an ingenious 20th-century clockmaker.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."