If you enjoy Cold War history, a ride on the Prague metro system is a must, a public transit network exposing lingering traces of the Communist era.
Some stations you should visit include:
Line A has the differently colored and patterned aluminium tiles representing the stations’ locations or names. Náměstí Míru is a fun visit thanks to the super long escalator (2 min 16 sec). Jiřího z Poděbrad has recently been returned to its original visual glory.
A great solo travel tip spotted this week on Live and Let's Fly.