Frank Lloyd Wright’s most iconic home dangles over a Pennsylvania waterfall.

Once the most painted on object in the world, this short campus fence is well on its way to being so again.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

A portion of the old Pirates stadium over which a defining home run once flew still stands even after the rest of the stadium was torn down.

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

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

An enormous, inside-out glass globe built in 1935.

This nearly endless university hallway is home to a unique sunset known as "MIThenge."

This bridge was the birthplace of a unit of measurement based on a fraternity joke.

Ice cream stand, snack bar, and time capsule of milk conveyance.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

Known as one of the most climbed mountains in the world, this barren peak is permanently bald thanks to an anti-wolf fire.

America's oldest archaeological site or a muddled case of wishful thinking.

A former zoo turned public park, where visitors can hang out in the old animal cages.

Secret North Korean passage discovered below the world's most dangerous border.

The most famous location in China was home to whole dynasties worth of imperial rulers.

The city of Halifax still bears the scars of the largest explosion prior to the atomic bomb.

This surreal statue brings a famous French novel about a supernatural cad to arresting life.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

A Parisian exterminator's shop whose storefront displays stuffed rats hanging from traps.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

This modest marker near Notre Dame identifies the very center of Paris.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.