Detail of the watchtower of the Alcatraz prison

adolf.martinez.soler

Detail of the watchtower of the Alcatraz prison

adolf.martinez.soler

A scenic view of Alcatraz Island in San Francisco Bay, California, against blue cloudy skies

rolanas.valionis1

A mesmerizing shot of Alcatraz Island and the old prison, the mountains in the background

tong.wu

The Alcatraz Island in San Francisco Bay, California, United States

georg.busch

A beautiful shot of Alcatraz Island in the distance on San Francisco Bay

michael.paland

An interior of the Main cell house of Federal penitentiary

mitch.slack

A scenic view of Alcatraz Prison in San Francisco, California, USA

maiknatt

A low-angle shot of a barbed wire against the clear blue sky

emily.ashford

San Francisco in California, the Alcatraz island in the beautiful bay, and the Pier 39 with the marina

pascale.gueret

Alcatraz Prison, an island prison in San Francisco Bay, off San Francisco, California, United States of America, North America.

viajar24h

A scenic view of Alcatraz Island in San Francisco, USA

ronald.bakker

United Airlines Boeing 777 flying low over Alcatraz Island in San Francisco during a Fleet Week Air show demonstration

andrew.bluestein

US Coast Guard helicopter flies over Alcatraz Island in San Francisco

andrew.bluestein

US Coast Guard helicopter flies over Alcatraz Island in San Francisco

andrew.bluestein

A view of the castle ruins in Hohnstein in the Harz near Nordhausen in Germany. Beautiful castle ruins in summer weather.

andreas.völkel1

A vertical shot of The Watchtower of Torrelodones in Spain during sunset

francisco.lancho

watchtower and stone wall of a castle.

chris.doal

An aerial shot of the watchtower Belvedere near the city Heerenveen under cloudy sky

mathijs.jonker

A vertical shot of silhouettes of a watchtower and trees reflecting on a calm lake during dusk

odyntsov

Dramatic rainbow against dark stormy sky, over watchtower on coastal cliff, fields shelving down towards sea, and limestone rocky shore. Malta,

charles.galea.bonavia

A vertical shot of Gradacac Castle in Bosnia and Herzegovina

omar.tursić

A beautiful view of a watchtower and mountains in Zlatibor, Serbia

petko.milević

A vertical shot of a wooden watchtower with a spiral staircase at Harangod in Nagykallo, Hungary

andrea.varga