New Orleans architect duo Curtis & Davis designed the the UFO-like building that opened in 1975 and is considered the largest fixed domed structure in the world.

Among the oldest cathedrals in the United States, the church was built in 1789 (the original structure at the site was destroyed in the Great New Orleans Fire of 1788). It’s also staggeringly beautiful inside, thanks to stained glass windows and frescoes painted in 1872 by Erasmus Humbrecht.

As the seat of colonial government, the Cabildo was the site of the Louisiana Purchase transfer ceremonies in late 1803. Artist William Woodward led a successful campaign to have the historic building preserved and restored when it had fallen to decay in 1895.

The stately facade of New Orleans' oldest fine arts museum anchors City Park. The neo-classical, Beaux Arts-style building opened in 1911 as the Isaac Delgado Museum of Art.

Designed by architect Charles Moore and Perez Architects, the structure was completed in 1978 and meant to celebrate the contributions of the city's Italian immigrants. Although widely acclaimed in artist and architect circles, the plaza never really caught on with average New Orleanians. Prior to its renovation, which was completed in 2018, some referred to it as the first "postmodern ruin,” but the whimsical structure now has a second life as an events venue. This past Carnival season, it hosted the Virtual Krewe of Vaporwave’s ball.

In 1905 Paul Doullut, a steamboat captain, designed a home in the Holy Cross neighborhood resembling the steamboats he guided up and down the river. In 1913, he built an identical home for his son. The homes have a Japanese pagoda style likely influenced by the Japanese pavilion at the 1904 World's Fair in St. Louis, mixed with ornate Gothic features.

T. Sellers Meric and Benedict Cimini designed the art deco wonderland that was once the main commercial airport of New Orleans. It was damaged by Hurricane Katrina's floods and restored in 2013. The airport now serves private, corporate, and military flights and is an events space hosting many "Great Gatsby"-themed parties.

The oldest building in the Mississippi River Valley (it was completed in 1752), Old Ursuline Convent is also the oldest surviving example of the French colonial period in the United States. The convent houses the Archdiocesan archives, a museum and an herb garden.

The 18th-century Creole colonial country home, which serves as headquarters from the Louisiana Landmark Society, is named for New Orleans mayor James Pitot. The house features a "parlor garden" dating back to the late 18th century.

The buildings at 500 St. Ann Street and 500 St. Peter Street framing Jackson Square were built in the late 1840s by the Baroness Micaela Almonester Pontalba. Truman Capote described the Parisian-style row house buildings as "...the oldest, in some ways most somberly elegant, apartment houses in America."

Built in 1826 and designed by François Correjolles, this home combines elements of a Creole cottage with Greek Revival features, including a Palladian facade.

Architect Benjamin Rodriguez built the home early 1850s, and it is the only home of the French Impressionist painter that's open to the public.

Built in 1838, the lighthouse was heavily damaged during Hurricanes Katrina and Rita but was restored in 2013. It's on the National Register of Historic Places.