Bethesda

The Madonna of the Trail statue
Wisconsin Ave & Old Georgetown Rd

The Madonna of the Trail is a sixteen foot monument to the benighted wives who were dragged out west to extreme hardship and poverty in the wild by their adventurous pioneer husbands.

Bethesda is not known for its sights; it's known for its restaurants and bars. Nonetheless, you might be interested to see:

The National Institutes of Health
9000 Rockville Pike (north on Wisconsin)

The mammoth collection of buildings housing the majority of the nation's government bio-research. Consequently, the grounds have been pretty much off-limits to non-employees since the 9/11 attacks and the ensuing anthrax mailings, since there are worries about the security of the bio-weapons research programs here. But the view from Wisconsin Ave of the main building is plenty impressive. If you see a helicopter landing on that main building, it's probably the president or one of the top cabinet officials—this is where they get their repairs.