“Petrified Canyon” (GCME8A) takes geocachers into the Martian landscape of the badlands in North Dakota. It’s placed in a petrified forest where ancient trees have turned to stone.

Adventurers discover the traditional cache, placed in late 2004, a few miles from the interstate. The difficulty 1.5, terrain 1.5 cache placed by Snowman and son receives praise from geocachers.

One log reads, “This is really a beautiful place. Thanks for bringing us here.” The cache has earned a dozen Geocaching.com Favorite Points and more than a 160 people have logged a smiley on the cache so far.

But cachers discover more than a small geocache. The cache owner says they may also spot wildlife. Rabbits, mule deer, big horn sheep and even a mountain lion have been seen in the area.

Continue your exploration of some of the most engaging geocaches from around the world. Explore all the Geocaches of the Week on our blog or view the Bookmark List on Geocaching.com.

“The Rock” (GC1EJ43) rises brick by imposing brick out of the banks of the Rhine river. The five-stage mystery cache earns a difficulty five, terrain five rating.

Geocachers step up to the challenge by stepping on the overgrown deck of an abandoned and crumbling bridge. The Geocaching.com video team thanks Bazzanowitz, nicita and Christian from Geocaching Magazin for inviting the team along as they solved the cache.

The Rock earned 160 Favorite points, and cachers uploaded more than 1200 pictures of the sweat-dripping trek to earn a smiley. Die2Amigos placed the cache in 2008.

A video showing cachers the cliff hanging, rock scrambling and rappelling adventure is now being produced to launch on the Geocaching.com video page.

Cachers must uses specialize climbing equipment to find five waypoints before attempting the final. Each waypoint requires dangling from the edge of the bridge or into the dark belly of the super structure. Cachers uncover codes to unlock the final cache. It’s located on a massive lone tower known by locals as “The Rock.” The attempt on the final demands a complex climb and decent.  Geocachers are cautioned to attempt the cache only if they’re experienced climbers.

Continue your exploration of some of the most engaging geocaches from around the world. Explore all the Geocaches of the Week on our blog or view the Bookmark List on Geocaching.com.

“Stadt im Wald” (GC17K3A) is a “Lost Place Cache.” The Multi-Cache takes geocachers through a rotting relic of the Cold War. The nine stages of the cache lead adventurers into an abandoned and decayed Soviet military base. This “lost place” in Eastern Germany is the size of a small city. The military installation has been largely forgotten since the fall of communism. The geocache was placed with landowner permission.

Geocachers are warned to take extreme safety precautions. They’re warned to be especially careful of broken glass and hidden holes in the ground. Geocachers are also reminded to respect the site and cause no further damage.

“Stadt im Walk” is a difficulty 3.5, terrain 3.5 cache. Hornesia placed the cache in 2007. It has accumulated more than 230 Geocaching.com Favorite Points.

This Geocache of the Week comes straight from two Lackeys traveling in Europe. They recorded local German geocachers as they completed the cache on June 2. The Geocaching.com video team is on location exploring some of the most exciting geocaching Germany and the Czech Republic have to offer. The videos will eventually be shown on Geocaching.com and YouTube.

Continue your exploration of some of the most engaging geocaches from around the world. Explore all the Geocaches of the Week on our blog or view the Bookmark List on Geocaching.com.

The search for the EarthCache “Glaciar Perito Moreno – Patagonia” (GC1JPHG) brings geocachers to a natural wonder of South America. The Southern Patagonian Ice Field represents the world’s third largest reserve of fresh water. To claim a smiley on this EarthCache adventurers must email the answers to two questions and a picture to the cache owner. Geocachers will only be able to find the answer to the questions if they’ve arrived at the coordinates on the cache page.

Dutzig created the difficulty 2.5, terrain 2.5 cache in 2008. So far, nearly 80 geocachers have logged a “Found it.”

The cache page details the powerful potential of the “Perito Moreno Glacier.” Dutzig writes: “The Perito Moreno Glacier is one of only three Patagonian glaciers that are not retreating. Periodically the glacier advances over the L-shaped “Lago Argentino” (“Argentine Lake”) forming a natural dam which separates the two halves of the lake when it reaches the opposite shore. With no escape route, the water-level on the Brazo Rico side of the lake can rise by up to 30 meters above the level of the main lake. The enormous pressure produced by this mass of waters finally breaks the ice barrier holding it back, in a spectacular rupture event.” The last rupture of the glacier was documented in July of 2008.

Continue your exploration of some of the most engaging geocaches from around the world. Explore all the Geocaches of the Week on our blog or view the Bookmark List on Geocaching.com.

Aliens, a lightsaber wielding possum, and a geocache that could save your life. That’s all in store for geocachers brave enough to attempt the Tasmanian night cache, “We Come in Peace” (GC1DA0H).

The themed Multi-Cache, with a difficulty 2.5, terrain 2.5 rating, uses a geocache as an alien intelligence test. Snuva hid the cache in 2008.

According to the cache page, if geocachers are cleaver enough to uncover the cache, they will be spared during an invasion. The cache page reads, “As a Schnauzer is easy to recognise but Geocachers can easily be confused with muggles, we are therefore making use of this medium to assist us in marking our intelligent friends the geocachers apart from the muggles, who will be vaporised one day when we can be bothered. Your part in proving your worthiness is simple: just trust us to take you on a walk in the dark. Yes, it must be in the dark.”

Geocachers use flashlights to lead them through a series of cache stages. They collect clues that eventually unveil the final location. The cache coordinates reveal a stunning view of Hobart, Tasmania. The last geocacher to log “We Come in Peace” wrote, “Great cache one of my favourites I have found in Tassie. TFTC.”

Continue your exploration of some of the most engaging geocaches from around the world. Explore all the Geocaches of the Week on our blog or view the Bookmark List on Geocaching.com.