Athens Plaka

Hadrian's Library, (☎210 32 49 350), Built in 132 CE in the architectural style of the Roman Forum, this library was once the scene of a pool, a garden, and as the name suggests, a library with reading rooms. The books made of papyrus are long gone, but some columns still stand. Does not take credit cards. No wheelchair access.
Archaeological Site of Kerameikos, End of Ermou (☎210 346 3552), Come to this burial ground to walk on over 1000 years of ancient, rotting nobility. No markers indicate who lies where, but blooming flowers, huge funerary statues, and remains of the ancient walls of Athens dot the landscape, making this former cemetery a beautiful archaeologicalexcavation site. Look for the Dipylon gate, once the city's main entrance, where Pericles gave a memorable speech honoring those who perished during the first year of the Peloponnesian War. Supposedly, the hill to the immediate right of the museum is where the most famous remains rest. Does not take credit cards. No wheelchair access.
Numismatic Museum, 12 Panepistimiou (☎210 36 52 057; www.nma.gr), It takes money to see money. More , coins than you could ever imagine are displayed in glass cases in this formal house of a German benefactor. As you walk through the displays, take note of the overzealous guards that watch your every move, almost assuming that you are going after one of these old pieces of change. With a huge variety of ancient currencies, this museum is worth your money—especially because it offers a complimentary hour-long audio tour of the first floor. Does not take credit cards. Wheelchair access. Has air conditioning.
Museum of Greek Popular Music, Diogenous 1-3 (☎210 32 54 119; www.instruments-museum.gr), Although this museum is easy to miss while fighting your way up the hill past the Roman Agora, there is no excuse for skipping out on this fun and quick musical experience. Hear different instruments and music varieties through black headphones next to the display cases that play recordings of the music being showcased. While Let's Go doesn't know the first thing about Greek Popular Music, the chance to learn different ways to play the defi (tambourine) makes this museum music to our ears. Has air conditioning.