One of the world's largest model railroads is a mind-boggling achievement.

A beautiful final resting place for some of the noteworthy deceased.

This "floating island" plateau sits 7,671 feet above the forest floor.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

These steeply terraced ruins are a stop along the Inca Trail to Machu Picchu.

A backdoor to Machu Picchu that only the most foolhardy infiltrator would attempt to breach.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

This strange, big-tailed beast became a Pennsylvania town's unofficial mascot.

Once a private collection, now the only museum of arms and armor in the Western Hemisphere - CLOSED.

The first declared National Monument in the United States.

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

New Jersey's last historic covered bridge was rebuilt from pieces of the original 19th-century structure.

Historic town settled in the 19th century because of its convenient location along a popular coal transport route.

See massive fossils that are over 200 million years old in northeastern Arizona.

Since 1947, this living history museum has been providing an immersive look at life in Plymouth Colony.

A mysterious castle built as a monument to lost love.

Lie in a hammock where George Washington stood.

In its day this historic fort held 100 cannons pointed in almost every direction to protect New York.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

True to its name, this bouncy walkway may be the world’s smallest suspension bridge.

Mysterious rocks that ring musically when struck.