Established in 1834, the Numismatic Museum of Athens (Iliou Melathron, El. Venizelou [Panepi­stimiou] 12, Greece; phone +30210 3632057) has a collection of 500,000 objects dating from the 14th century BC to the present day. The permanent collection, which spans six rooms on the first floor of the museum, focuses on coins of the Greek and Hellenistic city-states.

Admission, €3 (near $4). Open 1-8 p.m. Mon. and 8 a.m.-5 p.m. Tues.-Sun. (Closed Jan. 1, March 25, Orthodox Easter Sunday,...

In Portugal, Cacilheiros are orange-and-white ferryboats that make the 15-minute run over the Tagus River from Lisbon’s Terminal Fluvial do Cais do Sodré to the parish of Cacilhas daily, several times an hour, from sunrise to sunset. A one-way ticket costs €1.20 (near $1.65).

Cacilhas is more like a typical Portuguese coastal village than a neighborhood of a large city. In addition to many seafood restaurants (Aira-te-ao Rio, O Farol and A Cacilheira, to name a few), all...

The company Clever Travel Companion offers clothing with hidden pockets to discourage pickpockets. Items include men’s and women’s underwear ($19.90), tanktops ($29.90), longjohns ($23.90) and T-shirts ($29.90). Items are sold online only.