The only castle in North America to ever house European sovereigns.

This museum houses two of Mexico's most impressive Aztec monoliths.

These spectacular, symbolic serpents lie within the shadow of the Great Temple.

A disquieting Aztec sculpture displays hundreds of stone skulls representing the victims of human sacrifice.

Walk through a well-preserved World War II Nazi prison and transit camp.

Go surfing on this urban wave, "hacked" by local surfers.

These paved rills bring freshwater into Altstadt and could spell wedding bells for whoever stumbles into the waters.

Visitors dating back to the 1600s carved their marks in the stones of the iconic tower.

A pink sandstone column once used in ancient times to measure one's belly after a night of debauchery.

For over 300 years this little carving has been the city’s good luck charm.

Eat the ultimate iteration of Portugal's most beloved pastry.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

Elaborate tile work in this railway station tells the story of Portugal.

One man has installed bathtubs into the Utah desert floor to harness the powers of a natural hot spring.

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

A memorial to the unknown and unheralded men and women of the Cold War military and intelligence services.

The wild west is still alive and well at this authentic mining town watering hole.

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

The largest recovered section of Titanic sits in a hotel in Las Vegas.

10,000 flowered plants bloom in the City of Roses.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Try the frozen treat that inspired Arrested Development's famous banana stand.

This town is home to the world’s largest arch constructed entirely of elk antlers.