Cádiz is an ancient port city surrounded by the sea in southwest Spain. Because the city was constructed upon a spit of land that cannot support high-rises, its skyline has not substantially changed since medieval times. A portion of the “Old City” — an area characterized by narrow winding alleys connecting large plazas and markets — is seen in this Overview.

36°32'01.3"N, 6°17'49.7"W

Source imagery: DigitalGlobe

Check out the dendritic drainage patterns on this small bay in Prince Frederick Harbour, Western Australia. Dendritic literally means branched, as in resembling the pattern of a tree. This shape develops when streams move across relatively flat and uniform rock or over a surface that resists erosion.

15°04'39.9"S, 125°24'21.8"E

Source imagery: DigitalGlobe

Grammichele is located on the island of Sicily in southern Italy. The town was constructed in 1693 with a distinctive hexagonal street plan after an earthquake destroyed the nearby, old town of Occhialà.

37°12'53.0"N 14°38'11.0"E

Source imagery: DigitalGlobe

Boston is the capital and most populous city in the Commonwealth of Massachusetts, with more than 4.6 million people in its metro area. In this Overview, three waterways can be seen flowing through the city and emptying into Boston Harbor — Chelsea Creek at left; the Mystic River in the center; and the Charles River at right.

42°21'29.0"N, 71°03'49.0"W

Source imagery: Nearmap

For your daily dose of perspective, here’s a photograph of the space shuttle Endeavour, lifting through the clouds during its final launch in May 2011. The photograph was captured from a nearby NASA shuttle training aircraft.

Source imagery: NASA - National Aeronautics and Space Administration

The Tangalooma Wrecks is a shipwreck site on the western side of Moreton Island in South East Queensland, Australia. It consists of 15 vessels that were deliberately sunk in 1963 to form a breakwall for small boats. In addition to providing safe harbor, the wrecks also created a popular dive and snorkel site, attracting a variety of marine life such as wobbegongs, trevally, kingfish, yellowtail and other tropical fish.

27°09'46.2"S, 153°22'06.1"E

Source imagery: Nearmap

Three massive airplanes are docked at San Francisco International Airport in California, USA. SFO is the 21st busiest airport in the world by passenger traffic, accommodating more than 50 million passengers each year.

37°37'07.2"N, 122°23'35.8"W

Source imagery: Nearmap

Thousands of automobiles await shipment and distribution at the Philadelphia Auto Processing Facility in South Philadelphia, Pennsylvania. Located on the Delaware River, this 84-acre (34-hectare) facility handles both imports and exports. With connections to Interstates 95 and 76 and two large railways, it is a major supply chain hub for the U.S. automobile industry.

39°54'31.9"N, 75°08'12.5"W

Source imagery: Nearmap

Plastic greenhouses cover a stretch of shoreline on the south coast of Crete — the largest and most populous of the Greek islands. Inside these greenhouses, which cover an area of roughly 6 square miles (15 sq. km), large quantities of fruits and vegetables are grown for export. In the upper right corner of this Overview is the Bramiana Reservoir, which was built in 1986 to meet the needs of the thousands of greenhouses surrounding it.

35°01'45.4"N, 25°41'46.0"E

Source imagery: DigitalGlobe

The town of Palmanova, Italy, is recognized by its concentric layout known as a “star fort.” The rationale for this construction was that an attack on any individual wall could be defended from the two adjacent star points by shooting the enemy from behind. The three rings that surround Palmanova were completed in 1593, 1690, and 1813.

45°54'17.8"N, 13°18'35.8"E

Source imagery: DigitalGlobe

Large piles of coal await shipment on Kooragang Island, part of the Port of Newcastle in New South Wales, Australia. Established in 1984 with a capacity of 15 million tonnes per annum, the island now has a capacity of at least 120 million tonnes per annum. In July 2013, a record 10.3 million tonnes of coal was processed through the Port of Newcastle, with 83 of 114 ships loaded at the Kooragang Island terminal.

32°52'31.1"S, 151°46'04.0"E

Source imagery: Nearmap

Colorful fields surround Rauchenwarth, a small municipality in eastern Austria. Located roughly 10.5 miles (17 km) outside of Vienna, Rauchenwarth has a population of about 700 people. Cold, wet winters and hot, dry summers make this region ideal for growing corn, wheat, barley, rye, sugar beets, sunflowers, and soybeans.

48°04'54.7"N, 16°31'44.4"E

Source imagery: DigitalGlobe

Check out this awesome drone shot of a sunken ship in Marco Island, Florida. Located in the Gulf of Mexico, the island contains a city by the same name, which has a population of roughly 18,000 people. Marco Island is home to retired astronaut Michael Collins, the seventeenth American in space and one of just 24 people who have flown to the Moon.

25°54'57.7"N, 81°41'32.7"W

Source imagery: A2EOrigins