CacheSeeker

Geocaching is an outdoor sporting activity in which the participants use navigational devices techniques to hide and seek containers, called "geocaches" or "caches", anywhere in the world.
Geocaches are currently placed in over 100 countries around the world and on all seven continents, including Antarctica. After 10 years of activity there are over 1.3 million active geocaches published on various websites. There are over 5 million geocachers worldwide.

CacheSeeker will help you to find caches around you. It is designed to use largest CIS geocaching site - geocaching.su. Geocaching.su contains about 8500 caches,
with almost 6000 caches in Russia, more than 1500 caches in Ukraine and more than 500 caches around the world.

CacheSeeker will not limit you to geocaching.su though, you can import any caches in de-facto standard GPX format.