This former sugarcane transport tunnel is now a portal to a lovely beach.

An unnatural lake in a naturally beautiful setting.

The highest peak in Puerto Rico is home to a rare fern that can only be found on six trees at its summit.

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

The world's oldest surviving anatomical theater, where "the dead are pleased to help the living."

A twisted steel beam from the wreckage of the World Trade Center is the centerpiece of this memorial for those who died on September 11, 2001.

The incorrupt tongue of the patron saint of lost things is venerated in this basilica.

Centuries ago, red and white wine poured from the statue's breasts whenever a new Venetian ruler was elected.

One of the oldest still-working clocks in the world sits on an ancient tower.

A complex, nine-layer maze on the grounds of a Venetian doge's playground.

Armenian monks at an island monastery in the Venetian Lagoon make a rare rose petal jam.

Hanging within this medieval church are the bones of a beast allegedly slain by a fourth-century saint.

Venice's island of the dead.

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

The marble facade hides a little-known medical museum with early surgical instruments and rare copies of canonical texts.

An extensive collection of reliquaries containing the bones of saints housed in the largest Catholic church in Venice.

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

A gorgeous example of 13th-century Gothic architecture.

Pilgrimage site for star-crossed lovers.

Not far from the more famous House of Juliet, visitors will find the supposed residence of her lover.

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

A young Italian couple has been locked in an embrace for over 6,000 years.

The bones of some 7,000 soldiers killed in the historic Battle of Solferino are stored here.

One of the most well-preserved castles in Italy also contains a rare medieval example of a port fortification.