Forget Hollywood, one of the biggest stars in the world can be found in Roanoke, Virginia.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

A tunnel with windows, so you don't miss out on the impressive views.

The site of Billy the Kid’s most famous escape and the end to the Lincoln County War.

A sprawling collection of over 106,000 toys from around the world.

A multi-storied adobe complex has been inhabited for more than a thousand years.

A museum dedicated to the alleged Roswell Incident.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

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

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

The oldest continuously occupied public building in the United States.

Contractors in this Oregon town have been stamping their names in sidewalks since 1908.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

A French library that makes sure its love of books is writ large... giant in fact.

More than 2,000 species of tropical plants call this nature preserve and sanctuary home.

A priest with no formal artistic training used basic house paint to create gorgeous religious scenes inside this historic church.

An effigy of a trapped paratrooper dangles from a Normandy church to commemorate one remarkable D-Day event.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

The Scottish Reformation leader's grave was paved over and is now a parking lot.

A lush indoor jungle fills this bustling Madrid transportation hub.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

Look closely and you’ll notice that the color changes a third of the way up the tower.