Historic buildings and museums allow you to visit California's history firsthand.

Mission Basilica San Diego de Alcalá, the first of the great California missions, marks the origin of Christianity in the American west. Founded in 1769, this remarkable historical shrine provides an understanding of the roots of Catholicism in this part of the world, and a look at the extraordinary dedication of the Spanish priests who traveled far from their home country.

With its unique identity as a beach town, a border city, a bustling international port and a former frontier burg, San Diego has mixed and matched architectural styles to surprising and sometimes dazzling effect over the decades. While the influence of the region's early Spanish settlement remains prominent, plenty of signature architectural sites here draw on other, more disparate traditions. Here's a look at 7 eye-catching San Diego buildings and districts that architecture-minded visitors will love discovering.

With sun-splashed beaches, scenic hiking trails, world-class museums and top restaurants, San Diego offers plenty of budget-friendly ways to have fun. Some of the region's best sights, bites and more are inexpensive or even free. Check out these great ideas for enjoying San Diego affordably!