European Route E40 travels all the way from Calais, France, to Riddler, Kazakhstan. The road traverses nearly 5,000 miles, connecting the two countries via Belgium, Germany, Poland, Ukraine, Russia, Uzbekistan, Turkmenistan, and Kyrgyzstan.

Constructed in the 1970s by Nicolae Ceausescu in preparation for a potential military invasion, Romania's Transfagarasan highway connects the historic provinces of Transylvania and Wallachia. Initially considered to be "Ceausescu's folly," the road used 6,520 tons of dynamite during its construction. Today, the 94-mile highway offers beautiful scenic views of the Romanian countryside.

The Trans-Siberian Highway is a network of highways that extends across the width of Russia. Starting in St. Petersburg, on the Baltic Sea, it spans over 6,800 miles to Vladivostok, a port city on the Sea of Japan. The route links a number of historic cities, including Nizhny Novgorod, Kazan, and Chita.

Sometimes called the "Eighth Wonder of the World," the Karakoram Highway is the highest international paved road in the world. The highway runs for about 800 miles from Abbattabad, Pakistan, through the Karakoram mountain range to Kashgar, China, and reaches a peak elevation of 15,466 feet above sea level.

Highway 10 in Saudi Arabia runs for approximately 140 miles, from the oil town of Haradh, through the Rub Al-Khali desert, to the border with the United Arab Emirates. With nary a curve in sight — or even any considerable gradient up or down — the drive will take you just around two hours (though there’s not much to see en route).

Opened in 2000 and covering 15.23 miles in length, Norway's Lærdal tunnel is the world’s longest road tunnel, linking the cities of Bergen and Oslo. The Gotthard Base Tunnel in Switzerland comes in at 35.4 miles, but it is used only by trains.

In 1986, Life Magazine dubbed a barren stretch of U.S. Route 50 through the middle of Nevada “the loneliest road in America.” As there were no attractions or points of interest along the 400-mile route, the magazine said simply, “We don’t recommend it,” and noted that drivers would need serious “survival skills.” The nickname stuck and has since been embraced by the state’s tourism board.

Interstate 878 — which overlays a portion of the Nassau Expressway in the borough of Queens — is just 0.70 miles long, making it the shortest interstate highway anywhere in the United States. The road was initially intended to be a part of I-78 extending from Lower Manhattan through Brooklyn, though realignments left this portion as a small standalone roadway.

Located at Umlingla Pass in Eastern Ladakh, India, is the world's highest drivable road. It's 32 miles long and runs at an altitude of 19,300 feet, putting it higher than the base camps of Mount Everest. Construction was completed in 2021 to connect the towns of Chisumle and Demchok, and it is hoped that the road will promote tourism in the region.

With a staggering 26 lanes in certain sections, the Katy Freeway just outside Houston, Texas, is the world's widest highway by number of lanes. The highway doesn't run for very long — just 23 miles between Houston and the I-10 intersection at the city of Katy — but it serves more than 219,000 vehicles each day.

The Turquoise Trail is a National Scenic Byway connecting Albuquerque and Santa Fe in New Mexico. The trail is around 50 miles long and features a number of historic roadside mining towns, including Golden, Madrid, and Cerrillos. Although the mining industry has long faded, the towns have become popular destinations and are home to many art galleries, museums, and restaurants.

Launched in 2001, the Golden Quadrilateral project created a network of highways connecting four major Indian metropolises: Delhi, Mumbai, Chennai, and Kolkata. The roadway's shape forms a quadrilateral, hence the name. The 3,633 miles of highway also carry about 40% of the country's traffic, despite making up just 2% of India's total road infrastructure.

Often considered to be the most beautiful highway in the Midwest, Lake Shore Drive (also known as “The Drive” and “LSD”) hugs the curves of Lake Michigan for 16 miles. Look one way, and you’ll see beaches and the massive blue expanse of the lake. Look the other way and admire the stunning skyscrapers of the Chicago skyline.

With the intention of easing the city's traffic congestion by creating a network of tunnels, Boston's "Big Dig" became the country’s most expensive highway project when completed in 2007. All told, the project took 25 years to finish and cost more than $24.3 billion. Despite the cost, its completion successfully lowered Boston's carbon emissions by approximately 12%.

Considered the world’s longest road, the Pan-American Highway stretches from Alaska to the southern tip of Argentina, covering about 19,000 miles through 14 countries. However, a 60-mile stretch of the road remains incomplete. Known as the Darién Gap, this area covers a dangerous rainforest between Colombia and Panama and cannot be traversed using a conventional vehicle.

Authorized by the Federal Aid Highway Act of 1956, the Interstate Highway System was America’s first national network of highways. Today, the system has a total length of 46,876 miles. The state with the most miles of interstate highways is Texas, with 3,232 miles over 17 routes — nearly 7% of the total mileage nationwide.

Australia's Highway 1 is nicknamed "The Big Lap," given that it runs along the coast of nearly the entire country. Covering approximately 9,000 miles, it is the world's longest highway confined within a single nation. The road connects every Australian state except for Brisbane and Darwin.

Stretching across the country, the aptly named Trans-Canada highway covers approximately 4,860 miles from the Atlantic to the Pacific coasts. Connecting Vancouver Island, British Columbia, to Newfoundland and Labrador, the Trans-Canada Highway links major cities in all of the provinces and also offers access to many of the country’s incredible national parks. The route was completed in 1965.

Get your kicks on Route 66! The legendary "Main Street of America" was first paved in 1926 and became one of the country's first transcontinental highways, helping travelers go west to the Pacific Ocean. Along the way, Route 66 passed through dozens of towns, and had a role in the invention of motels and bumper stickers. It has since been decommissioned, but Route 66's legacy lives on.

The Autobahn covers more than 8,000 miles of road, most of which has no enforced speed limit. One study showed that drivers average 88 miles per hour on the system's six-lane sections, which is higher than any speed limit in the United States. Despite that, statistics show the Autobahn is actually pretty safe, with fewer accidents on average than on U.S. highways.

Stretching 3,365 miles, U.S. 20 begins in Boston, Massachusetts, and extends all the way to Newport, Oregon. The coast-to-coast route has held the title of the longest road in the country since 1963. For much of its route, U.S. 20 runs almost parallel to I-90, which at 3,020 miles is the longest interstate highway in the country.