A monument at Alicante Marina honors a little-known hero of the Spanish Civil War.

Legends surround this natural rock formation that looks like a Moorish king wearing a crown.

Fascinating exhibits of prehistoric and ancient artifacts displayed with a uniquely modern touch.

One of the largest caves in the world open to the public.

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.

Something's missing between the arcades of the Palazzo della Ragione in "the city of the three withouts."

This old medieval prison tower has been a site of astronomical research for more than 250 years.

In medieval times this small stone seat was used as a bizarre way to punish insolvent debtors.

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

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

The pile of books behind the dignified writer gave the statue a most undignified nickname.

Where Venice's gondolas go for a tune-up.

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.

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

This community on a small Venetian island has taken to painting their houses in bright neon hues.

This statue honors the thousands of Allied avians that served and died for France during World War I.

This charming old building's loose connection with the Scottish Reformer is what saved it from demolition after it split apart.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

This marine reptile was discovered by one of the 19th century's greatest fossil hunters.

Once home to a Scottish baronet, this 18th-century historic house doubles as a legendary art space.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

This network of narrow, medieval passages has the most delightful name.

Iceland's tribute to its thankless civil servants.