Sections of the iconic limestone columns have been left uncleaned as a reminder of the city's polluted past.

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

This spot memorializes one of the greatest plays in NFL history, unless you happen to be a Raiders fan.

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

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

Meet your friends, marry your true love, or tell your enemies to kiss your butt under this historic Pittsburgh timepiece.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

There are eight natural springs around town, each with a slightly different taste.

While most of the games in this arcade take quarters, that would have been a small fortune when they were made.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

The sanctuary holds what was once believed to be the saint's incorruptible tongue.

A mesmerizing landscape of 18th-century cellars carved out of the land.

Be(w)ar(e) the moat around this historic Czech castle.