Welcome to the world of bench mark hunting! It's an activity the whole family can enjoy, and the only equipment you need is your iPhone and a good pair of shoes.
For over 100 years, the U.S. government has been placing survey markers (also known as "bench marks") across the country to mark a location's altitude or latitude and longitude (or both). There are over 750,000 of these spread across the country. With this app, you can find any of them. Once you've found one, you can use this app to log your find, including adding photographs and notes.

Features:
*Log your finds; include up to four photos in addition to descriptive text
*See bench marks on map view or list view
*Bench marks are color coded to show accuracy and status
*Share finds via e-mail, SMS, Facebook, or Twitter
*Database is an up-to-date, parsed version of the NGS datasheets, converted into an easy-to-read format, with separate sections for description, history, and recovery details.
*Search by current location, ZIP code, or specific lat/lon
*Display results in DD.ddd or DD MM SS format
*Tap any marker in map view to see details
*Optimized for the iPhone 5