This once-grand marvel of engineering is now 41 miles of scenic hiking trail.

This unique crypt designed by Frank Lloyd Wright for his longtime friend was not completed in either man's lifetime.

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

A beautifully designed asylum was resurrected as a hotel and art center with a ghost story or two.

Ruins of a once-prized railroad station in New York.

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

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

A whale rib was used to advertise the store by the arch that offered exotic goods from far away.

A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

Pilgrimage site for star-crossed lovers.

Go inside to really appreciate this 500-year-old technological masterpiece.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.