A once grand hotel is being retaken by the wilderness it once capitalized on.

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

A daily replay of the experiment that proved the rotation of the Earth.

Dr Barnes' $25 billion private collection of art and arboretum.

A layered tribute to the work of mosaicist Isaiah Zagar.

An Irish Memorial commemorating those who perished due to potato blight.

Step into Monet's world at this fine-dining restaurant in the middle of a New Jersey sculpture park.

One of New Jersey's oldest surviving buildings still bears the mark of our former British overlords.

A unique sculpture park that specializes in the huge and bizarre.

In the woods of New Jersey lie the ruins of a munitions village abandoned after World War I and the remnants of a 1920s wooden racetrack.

Hidden deep within New Jersey Pine Barrens is a massive graffiti wonderland.

Home on the Hillside, and home of the first breakfast cereal.

Rising out of a clearing in New Jersey's Pine Barrens is an Aztec-inspired monument to the "Lindbergh of Mexico."

A flamboyantly decorated bridge signals diversity and fellowship at the entry to Indianapolis' Broad Ripple Village.

The seat of Buffalo government is a gorgeous Art Deco palace.

The absurd creation is a compulsory destination for selfies in Buffalo.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

This Arabesque Italian castle was built with a primitive, if ingenious, air-conditioning system.

Thousands of well-dressed mummies below a monastery.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

France's most famous cemetery, with some of its most curious tombs.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

A six-ton wedding present for the King of the Scots.

A statue in the heart of Edinburgh honors a bear that served in the Polish military during World War II.