This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

One of the world's oldest working clocks is curiously missing the Zodiac sign of Libra.

The tomb of the mythological founder of Padua is not hidden in some obscure crypt, but stands right in the middle of the city square.

Built to repay the sins of the father, this church is home to one of the most valuable works of Western art.

This medieval castle was reconstructed by Carlo Scarpa.

Pilgrimage site for star-crossed lovers.

A gorgeous example of 13th-century Gothic architecture.

These elaborate gothic monuments honor Verona's medieval lords.

A whale rib was used to advertise the store by the arch that offered exotic goods from far away.

A sinister pyramid in the Frari contains the heart of the famous neoclassical sculptor.

Turtles swim in a pond surrounding a classical temple in this lush park in Vicenza.

One of the tallest bell towers in Italy plays a particular melody at just two times each day.

Venice's island of the dead.

According to tradition this is the oldest church in Venice, but its actual age is a mystery.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

As can be expected from a centuries-old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

Go inside to really appreciate this 500-year-old technological masterpiece.

Two stone columns flank the grand Venice square, but there were supposed to be three.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

This bridge is haunted by the ghost of a distraught mother.

An early life spent in this "Old Kentucky Home" inspired the writings of North Carolina's most famous novelist.

This rare basilica nestled right in downtown Asheville is an architectural marvel, inside and out.

A highway marker that honors a former spy plane pilot and local hero.

This small museum is kept in a house that was integral to the genesis of Uncle Tom's Cabin.