One of the largest Roman settlements in Portugal.

This romantic, decaying 13th-century ruin on the edge of Sherwood Forest is reputedly one of England's most haunted places.

These abandoned coal mine towers near Sherwood Forest might soon boast the U.K.’s longest zip-line.

These bleak 800-year-old ruins were once the royal residence of choice for hunting in Sherwood Forest.

The largest oak in England is said to have been the hideout of Robin Hood and his Merry Men.

This isolated outpost was once the only place to cross the Colorado River for hundreds of miles.

When it was built in 1929, this historic bridge was the only place to cross the Colorado River for 600 miles.

Dramatic river bend surrounds a natural red-rocked pedestal.

Hidden inside this Arizona fast food franchise is an in-depth exhibit on the famed WWII counterintelligence program.

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

This sanguine boulevard was named after a deadly cowboy bar fight.

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

This rusted car found in Petrified Forest National Park's Route 66 exhibit may be the most photographed abandoned car in the country.

Red sandstone structures dominate this landscape, which has been inhabited for some 5,000 years.

Out of a desire to feed hungry soldiers, a franchise-altering idea was born.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

A series of waterfalls and pools that flow through the 'Ohe'o Gulch and into the ocean.

The century-old plant starred as the villainous clown's lair in the miniseries based on Stephen King's "It."

While these wooden totems bear a striking resemblance to First Nations artwork of British Columbia, their actual origins lay on the opposite side of the Pacific Ocean.

One of the two original gateways into the Kasbah, this gateway is a nesting site for storks.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

Reaching this rock formation involves a hike through rocky rapids and springs where wild turtles reproduce.

Founded as a refugee camp, now a popular tourist spot.

At this faithfully preserved medina off the Moroccan tourist circuit you can walk through six centuries of history in one day.