Millennials spend more on travel than any other age group.

And the place currently sparking the most wanderlust? Lisbon, Portugal.

It’s the most popular travel destination for millennials, according to travel-planning site müvTravel, which created its Top 30 Millennial Travel Destinations for 2019 list by analyzing the most popular bucket-list destinations of müvTravel’s millennial users. According to the site, millennials are most interested in places that offer “memorable and original moments,” as well as “activities that focus on sustainable and personalized local experiences.”

Lisbon’s charm can be chalked up to its traditional architecture and cobblestone streets, but it also has a buzzing nightlife. Millennials have said they love the city for its close proximity to nearby destinations, like the resort town of Sintra and several beaches, which make for the ultimate day trips.

Business Insider spoke to two millennials who have visited Portugal's capital city over the past few years to get a sense of how they spent their time there.

Below, see what it's like to visit Lisbon as a millennial.

Are you a millennial with insider travel tips about a burgeoning, international hotspot to share? Email this reporter at [email protected]

Lisbon is on the western coast of Portugal; the city borders the Tagus River to the south. According to a 2010 census, the city is home to 545,000 residents — and a New York Times article from 2018 put the city's annual tourist count at a whopping 4.5 million annual visitors. There are two windows of time that are considered the best time to visit the city: March to May, and September to October.

Foto: Lisbon, PortugalsourceGoogle Maps

Source: Google Maps, World Population Review, The New York Times, US News and World Report

First stop after landing at Lisbon International Airport, which is a 20-minute drive from the city center: Going on a Sandeman tour, according to 27-year-old Nicole Berrio, who visited Lisbon three years ago. Sandemans offers free tours across 20 cities worldwide.

Foto: sourceESB Professional/Shutterstock

Source: Google Maps, New Europe Tours

"They're a great way to get your lay of the land on your first day in a new city," she told Business Insider. "If you get a cool guide, ask them for recommendations on local hotspots."

Foto: sourceCourtesy of Nicole Berrio

But one of the best ways to get around Lisbon is by aimlessly wandering the streets, which 26-year-old Caroline Josey did on her visit.

Foto: sourcevichie81/Shutterstock

"My favorite aspect of Lisbon was getting lost and miraculously falling into these truly majestic sites or cozy restaurants," Josey told Business Insider.

Foto: sourceCourtesy of Caroline Josey

According to Josey, Alfama is a must-see neighborhood. "Tram 28 takes you through the old streets that are the only part of Lisbon preserved from the 1755 Earthquake," she said.

Foto: sourceCourtesy of Caroline Josey

Alfama was previously all of Lisbon, and as the city grew, it became the heart of the city, according to Time Out. It's also home to some amazing street art.

Foto: sourceLuis Louro/Shutterstock

Source: Time Out, Metro UK

Another must-see, according to Berrio, is the LX Factory, an abandoned industrial site that has been turned into a creative, cultural, and gastronomic area.

Foto: sourceKajzrPhotography/Shutterstock

Berrio also suggests paying a visit to "the best aquarium ever" — the Lisbon Oceanarium.

Foto: sourceStockPhotosArt/Shutterstock

There's also the São Jorge Castle, Josey said. It's one of the most iconic symbols in Lisbon.

Foto: sourceCourtesy of Caroline Josey

Source: Lisbon

Blogger Lauren recommended checking out miradouros, or viewpoints for panoramic views of the city, such as Miradouro de Sao Pedro de or Portas do Sol. Many of the sites have kiosks for drinks, she wrote.

Foto: sourceSamuel Borges Photography/Shutterstock

Source: Cosmic Breakfast

For shopping delights, pick up a book at Ler Devagar, a paper mill that's been turned into a bookstore.

Foto: sourceRadiokafka/Shutterstock

Source: Yelp

Lisbon comes to life after the sun goes down, according to Josey. "Locals flood the allies either going on an evening run or sipping some sparkling sangria along the Tagus River," she said.

Foto: Nightlife in Lisbon's Chiado neighborhood.sourceSalvador Aznar/Shutterstock

Catch the sunset and a drink or two at PARK, a rooftop bar atop a parking garage in the district of Bairro Alto.

Foto: View of Bairro Alto.sourceGustavo Frazao/Shutterstock

Source: Yelp

Berrio recommends eating at one of Michelin-starred chef José Avillez's three restaurants: Belcanto, Barrio do Avillez, or Beco. "Make friends with the waiters at Belcanto for a private kitchen tour and to garner a secret entry into Beco," she said.

Foto: Berrio and boyfriend Gavin at Belcanto.sourceCourtesy of Nicole Berrio

Afterward, get cocktails at Double, "a great cocktail bar," according to Berrio. She recommends getting the Tales of Thailand.

Foto: sourceCourtesy of Nicole Berrio

In her blog, Lauren suggested spending a night out bar-hopping in Bairro Alto or on Pink Street.

Foto: Pink Street.sourcekvika/Shutterstock

Source: Cosmic Breakfast

For places to stay, there are plenty of options. Lauren raved about We Love F. Tourists, a Lisbon hostel. Its central location was great for walking everywhere, she wrote.

Foto: The hostel is located near Rossio Square.sourceLALS STOCK/Shutterstock

Source: Cosmic Breakfast, Hostelworld

For a hotel experience, there's also Pestana CR7 Lisboa, a modern hotel with speedy Wi-Fi geared towards millennials.

Foto: sourcestudio f22 ricardo rocha/Shutterstock

Source: Time Out, Pestana CR7

You'll also want to make time for a beach day. Situated along the coast, Lisbon is close to several beaches, from Praia do Ouro (Beach of Gold) to Carcavelos Beach.

Foto: Carcavelos Beach.sourcekatatonia82/Shutterstock

Source: The Culture Trip

Both Josey and Berrio recommend taking a day trip to Sintra, a resort town directly northwest of Lisbon in Portugal's Sintra Mountains.

Foto: sourceElena Kharichkina/Shutterstock

Sintra is about a 30-minute drive from Lisbon.

Foto: sourceGoogle Maps

Source: Google Maps

"Sintra is constantly a solid 10 degrees cooler [than Lisbon] amid lush vegetation and misting clouds that continuously roll into the town," Josey said. "This makes you feel like you’ve entered a fairytale and a town that’s truly magical."

Foto: sourceRolf E. Staerk/Shutterstock

Sintra is known for the Pena Palace — a "modge-podge" of various Moorish, Roman, and Medieval architectural influences "that looks like it brought Disneyland to Europe," Josey said.

Foto: sourceFresnel/Shutterstock

But that isn't Sintra's only fortress. Berrio also recommends checking out the Castle of the Moors.

Foto: sourceKuryanovich Tatsiana/Shutterstock

But no trip to Portugal is complete without picking up a Pasteis de Nata from a local pastry shop, a Portuguese custard tart dusted with cinnamon.

Foto: Pasteis de Nata at Pasteis de Belem café in Lisbon.sourceFoodAndPhoto/Shutterstock

Source: Trip Advisor