A visual exploration of the areas in, around and on top of the 49 distinct hills that make up San Francisco's iconic landscape.

Downtown San Francisco is seen from the top of Sutro Tower, part of which can be seen at right, on June 27, 2013 in San Francisco, Calif. Sutro Tower celebrates its 40th anniversary on the Fourth of July this year.

Visitors from Boston Joel Schenk, (l-r) Adam Simon and Sophie Michaux, along with their friend Azat Fishyan, drink beers at the top of Corona Heights on August 15, 2013 in San Francisco, Calif.

Valets wait to park cars for a private event on Broadway Street on September 25, 2013 in the Pacific Heights area of San Francisco, Calif.

Aaliyah Bey walks towards a cliff and her boyfriend, Jerome Bright, at Sutro Heights on March 26, 2013 in San Francisco, Calif.

Marcus Conant, a doctor known for his work in the early days of the AIDS epidemic, poses for a portrait in his home on Castro Hill on June 21, 2013 in San Francisco, Calif.

A man walks along a railing in Grand View Park, also known as Turtle Hill, on April 18, 2013 in the Golden Gate Heights neighborhood of San Francisco, Calif.

Tim Butterer and his dog Sammy traverse a hill in the southwestern region of John McLaren Park on September 14, 2013 in San Francisco, Calif.

Mike, (left-right), Jason, Vicente, Christopher and Benji prepare to leave a skatepark in between Crocker Amazon Playground and John McLaren Park on September 14, 2013 in San Francisco, Calif.

Parke Lewis-Deweese, a gardener with Parks & Rec, leaves a trail in the dirt as he picks weeds and removes other invasive species on July 13, 2013 in the Edgehill Mountain Open Space in San Francisco, Calif.

Visitors to Coit Tower are seen on the top floor on September 18, 2013 in the Telegraph Hill area of San Francisco, Calif.

Washington and Berkeley players clash during a football game at Washington High School on August 31, 2013 in in San Francisco, Calif. Washington played Berkeley to a 40-8 loss in the first game of the season.

Jeffrey Miller poses for a portrait on the playground he designed in Lafayette Park on June 1, 2013 in San Francisco, Calif. Miller chose the stones for the playground, seen behind him, on three trips to Montana. Lafayette Park is slated to reopen June 8, 2013.

A visitor traverses the top of Corona Heights on August 15, 2013 in San Francisco, Calif.

Mario Mendieta installs a sign at the corner of Filbert Street and Grant Avenue on September 18, 2013 in the Telegraph Hill area of San Francisco, Calif. Mendieta, a 7457 sign worker, was installing additional signage to the area around Coit Tower.

Telegraph Hill is seen from Embarcadero Center in early morning light on September 23, 2013 in San Francisco, Calif.

Jillian Metzger, 3, runs after playing on a tire swing at Walter Haas Playground in Diamond Heights on March 26, 2013 in San Francisco, Calif.

Conor McDonald climbs a section of "Mother Peace," a Mark Di Suvero sculpture at Crissy Field on October 5, 2013 in San Francisco, Calif. A series of Mark Di Suvero sculptures are installed at Crissy Field from May 2013 until May 2014 as part of SFMOMA's SFMOMA On the Go project, featuring art installations around the Bay Area while the museum is closed for renovation.

Architect George Homsey, of EHDD, works on a home renovation project for a friend in his home office on August 23, 2013 in the Dolores Heights area of San Francisco, Calif.

Spots of light are seen on the Pacific Ocean looking west from Sutro Heights on April 2, 2013 in San Francisco, Calif.

Hana Sidia, center, and Dan O'Brien, right take in the view of the bay during a wedding reception for Cynthia Aranda and James Streicher at the James Leary Flood Mansion on September 28, 2013 in the Pacific Heights area of San Francisco, Calif.

Patricia Wood, left, and Bill Pasquinelli sit quietly on a concrete hatch adorned with the 49ers logo near the top of Mt. Davidson on August 8, 2013 in San Francisco, Calif.

Pedestrians pass by the Brocklebank Apartments on Sacramento Street on September 6, 2013 in the Nob Hill area of San Francisco, Calif.

People enjoy rented paddle boats at Stow Lake near Strawberry Hill on July 25, 2013 in San Francisco, Calif.

Tom Cooke washes his car on October 23, 2013 in the Forest Hill neighborhood of San Francisco, Calif. Mr. Cooke was washing his car after attending a wedding earlier in the day, and was headed to a funeral afterwards.

Kelly Martin and Robert Da Silva (l-r) walk on Baker Beach just before sunset on October 5, 2013 in San Francisco, Calif.

Terrance Henderson, left, and Octavious Webster, work to clean out an apartment on November 1, 2013 in the old portion of the Hunters View community in San Francisco, Calif. The portion of the housing project south of West Point Road and west of Middle Point Road is currently being dismantled.

A woman passes in front of the main building on USF's Lone Mountain Campus on November 6, 2013 in San Francisco, Calif.

Visitors take in the view from the top of Corona Heights on August 10, 2013 in San Francisco, Calif.

Isaura Luna (red shoes) and Axel Reynoso hang out in the Ingleside Branch of the San Francisco Public Library on December 11, 2013 in San Francisco, Calif. The two friends attend Lincoln High School in the Sunset district.

People wait under the Ocean Avenue/CCSF Pedestrian Bridge on Ocean Avenue for inbound KT-Ingleside/Third Street trains on December 11, 2013 near City College of San Francisco in San Francisco, Calif.

Sister Anna Tram Nguyen waters flowers by a statue portraying Jesus as a shepherd in front of the Convent of the Good Shepherd on University Mound on June 10, 2013 in San Francisco, Calif.

Third and fourth graders from E.R. Taylor school explore John McLaren Park on September 11, 2013 in San Francisco, Calif.

The silhouettes of Kimberly and Porsha Lewis, along with a shadow cast by the top of the hill, are seen on a wall on the east side of Lakeview & Ashton Mini Park at Merced Heights on March 24, 2013 in San Francisco, Calif. It was Porsha's first visit to the park; the two sisters were visiting a friend who had just moved to a house down the street.

People watch the sunset at Baker Beach on October 5, 2013 in San Francisco, Calif.

Two people, who declined to give their names, spend time together reading in Holly Park on June 8, 2013 in San Francisco, Calif.

Fireworks explode over Candlestick Park on September 22, 2013 in San Francisco, Calif.