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

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

Breathtaking and huge 430 year old maps of Italy.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

A monument celebrating the idea of reaching inaccessible places.

A hotel with a rich Wild West history of miners and bootleggers.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

The location where the iconic movie character declared it was time to go home.

Most-visited and most-photographed slot canyon in the American Southwest.

Dramatic river bend surrounds a natural red-rocked pedestal.

More than a century old, this trading post resides in the Navajo Nation.

A classic Route 66 landmark that was built with scrap lumber and is held together with kitsch and puns.

All of the 20 occupied houses in this mostly abandoned town feature some curious display of junk art.

An exotic wildlife habitat right off The Strip.

In the power of this waterfall, Alexander Hamilton saw the potential for industry.

This colorful gate stands as an entrance to the walled city of Old San Juan.

This chapel on a cliff is renowned for its healing powers and was founded on the site of a supposed divine intervention.

This tiny home was originally a narrow alleyway.

Legend tells how a Spanish soldier disappeared from this isolated sentry box without a trace.

This 150-year-old train station and caboose have been turned into a railroad museum, enjoyed by young and old alike.

The rusting remains are visible sticking out of the waters of the Delaware Bay.

World War II bunker still standing on the New Jersey beach.

The flagship building of an early national restaurant chain is a superb example of terra cotta art.