Panama Viejo; +507 226 8915; $3 for museum, $4 for ruins, $6 for both; open Tuesday-Sunday, 9 a.m.-5 p.m.
The Panama Canal took 250,000 people more than 10 years to build (not counting the original failed French-led effort), transports 40 boats each day (taking eight to 10 hours per transit) and costs an average of $85,000 per vessel.
Luckily, tours are a little less, and a partial transit with Canal & Bay Tours costs $135 per person, including breakfast, lunch and transfer though two sets of locks.
The Panama Canal celebrates its centenary in 2014, and to mark the occasion it's undergoing a $5.25 billion modernization and expansion.
Progress is best viewed from above. Air Charter Panama arranges one-hour helicopter tours covering the Pacific and Atlantic sides of the canal from $749 for three passengers in a Robinson R44.