Huacachina, Peru

Huacachina is a genuine desert oasis. It's a lagoon but it's drying up as the salty water slowly drains back in to the sand.

Tunguska lake, Siberia

Tunguska lake is the result of what most geologists believe to be an air burst from an approaching meteorite. The impact flattened around 80 million trees and is the largest extra terrestrial impact in history. This happened on June 30 1908.

http://maps.google.com/maps?f=q&source=s_q&hl=en&q=%D1%80%D0%B5%D0%BA%D0%B0+%D0%A2%D1%83%D0%BD%D0%B

3%D1%83%D1%81%D0%BA%D0%B0,+Russian+Federation&ie=UTF8&cd=1&geocode=FQfs5QId1q0KCA&split=0&z=12&iwloc=A

"El Capitan" Yosemite valley, California

This giant granite monolith is 100 million years old and at it's highest point stands 3,000 feet (910m) tall. It was carved by glacial action and is a favorite of rock climbers who take 4-5 days to reach the top, sleeping on cots fixed to the sheer face.

http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=el+capitan&sll=37.649034,-95.712891&sspn=

38.237497,78.837891&ie=UTF8&ll=37.716146,-119.633045&spn=0.018807,0.038495&t=h&z=15