Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

Created in 1972, the famous sculptor's intricately detailed monument to San Francisco is overflowing with city landmarks.

This working class sculpture pounds his hammer all the livelong day.

The "Seinfeld" diner.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

A century-old hotspot for jazz, frequented by everyone from Charlie Chaplin to Al Capone.

Iceland's largest geothermal mud pool is a little bit haunted and a little bit dangerous.

The unbelievably opulent home built for an infamous newspaperman.

The site of a 19th century "dream city" that almost rivaled Chicago before being swallowed by the Indiana sand dunes.

A 19th-century Gothic, castle-like statehouse by the Mississippi River.

Abraham Lincoln's likeness rests at the top of this giant totem pole.

Elvis's own personal tropical hideaway.

Tiki luxury on Nob Hill.

When you can't get to the Pacific, just go to Florida.

This historic hotel invented the chocolate brownie.

Mining caused an asbestos emergency in this small town.

This elaborate towering structure was once famed for its revolutionary height.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Don't blink or you'll miss it.

Not to be confused with the iconic New York City skyscraper, this Chicago building is a vibrant hub for artists.

The most magnificent bottle house in a town strangely full of them.

This museum holds a fully-functional replica of the "Turtle," the first American submarine ever built.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

An extravagant western hotel where every floor is the "ground floor."