Now: Rich with both history and contemporary vitality, Mission Dolores and its sloping park are a communal back yard for multiple neighborhoods. The section of 18th Street that crosses through is a little culinary Mecca, with Delfina, Tartine, and BiRite (grocery and creamery) drawing crowds every single day.
Then: The oldest intact structure in San Francisco, the Mission Dolores was built in 1791 from adobe and redwood. It survived the 1906 earthquake and fire, although the accompanying church did not, and was rebuilt in 1913. The name of San Francisco itself is linked to the Mission Dolores - the actual name is Misión San Francisco de Asís, named for missionary Francisco Palou.
How To Get There: 18th Street is an easy and fun walk from 16th Street/Mission, which in turn is an easy trip from any other BART station (Powell, Montgomery, Civic Center). It's also an easy and fun walk from Castro, directly down 18th. The J-Church Muni line crosses 18th Street at the bottom of Dolores Park, and 20th Street at the top. There is really no reason to try to drive directly here, and if you try you may have a hard time parking.

Dolores Park, looking up toward Church 20th Streets

Bridge from Dolores Park to Church Street

Dolores Park on the weekend

Dolores Park, from Dolores Street

City view from the top of Dolores Park, at Church and 20th Streets

Looking east from the top of Dolores Park

City view from the middle section of Dolores Park

Bench at the top of Dolores Park

The upper slope of Dolores Park, near Church and 20th Streets

Church Street at 20th Street, near the top of Dolores Park

Dolores Park, from Church Street

J-Church Train outbound at the top of Dolores Park

Walking path at the edge of Dolores Park leading down toward 18th Street

Bench at the top of Dolores Park

Looking down over Dolores Park in late fall

Dolores Park, near the bottom

Dolores Park, looking down toward 18th Street

18th Street at Church Street

18th Street, bordering Dolores Park at the tennis courts

Looking down across Dolores Park toward Dolores Street

Playground in Dolores Park

The bottom of Dolores Park where Dolores Street meets 19th Street

Dolores Street near 19th Street

Dolores Street at 19th Street

Dolores Street at 19th Street, facing Dolores Park

Sidewalk on Dolores Street near 18th Street

J-Church Muni Train at 20th Street

J-Church Train crossing 20th Street at Church Street

Dolores Street at 18th Street

Dolores Park Cafe, on Dolores Street at 18th

Bi-Rite Grocery, on 18th Street between Dolores and Guerrero Streets

The line to get ice cream at Bi Rite Creamery

Bi Rite Creamery

Delfina Italian Restaurant on 18th Street between Guerrero and Dolores

Pizzeria Delfina on 18th Street, next to Delfina Restaurant

Farina Focaccia and Italian Kitchen, on 18th Street near Guerrero

The corner of Guerrero Street and 18th Street, at Tartine Bakery

Tartine Bakery, on Guerrero at 18th

18th Street at Guerrero Street

Women's Building, on 18th Street between Valencia and Guerrero Streets

Front entrance of the Women's Building

Valencia Street at 18th Street

The Apartment vintage furnishings, on 18th Street at Lexington Street

Dolores Street at 17th Street

Dolores Street at 16th Street, in front of the Mission Dolores Basilica

Mission Dolores and Basilica

Entrance to the Mission Dolores

Basilica at Mission Dolores, rebuilt in 1913

Mission Dolores, built in 1791 - the oldest building in San Francisco

Original redwood beams across the ceiling inside Mission Dolores

Statues inside Mission Dolores

Cemetary adjacent to the Mission Dolores

Statue of Junipero Serra in the center of the Cemetary

Gravestone at Mission Dolores Cemetary