A pair of gargoyles peer into unsuspecting passengers at Denver’s conspiracy-packed airport.

A marble cornerstone marks the location of what could have been a presidential palace.

Larger-than-life cut-out murals of James Dean and Elizabeth Taylor, dedicated to their 1956 film ‘Giant.’

This landmark honoring a local beer brand is an iconic part of the Minneapolis skyline.

This swanky speakeasy is Denver’s oldest bar—and hasn’t changed a bit since 1933.

A multicolored mineral mound dribbles piping hot spring water right off the side of a highway.

Each year, teams of the world's best snow sculptors have 65 hours to create frozen masterpieces.

There are eight natural springs around town, each with a slightly different taste.

While most of the games in this arcade take quarters, that would have been a small fortune when they were made.

Natural rock water slides hidden in the remote forests of northern Idaho.

Ghost town with a beer-drinking goat for mayor.

Locally known as the "Onion” and the "Egg Beater,” Casper’s most recognizable buildings are beloved local landmarks to many, and eyesores to others.

A popular rock that acted as a waymarker for American pioneers.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

Native Americans built this circle of stones, which was used to predict astronomical events.

One of three remaining theatres in the United States created in the Art Deco Mayan Revival style.

France's national museum of scientific and industrial instruments.

A cave's rare beauty held a cavernous secret hidden underground.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.