Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

This hotel was the site of major events in sports and radio history. It was also used as a detention center during World War II.

These hut foundations are believed to be the residence of Romulus, founder of Rome.

An ancient Roman temple first dedicated to an emperor's wife is now a church.

A sculpture serving as an homage to Pope John Paul II.

A glimpse into the "Logging Capital of the World" at a time when there was far more forest and far less machinery.

Rustic natural hot springs in the deciduous rain forest.

This striking statue brings a scene from the African savannah into central London.

The wooden telephone box hidden away in London's Piccadilly was the original prototype of the iconic kiosk.

This statue includes the molehill that toppled a king.

This luxury shopping lane has been protected by its own tiny police force for over a century.

This hidden green space is the city's second largest conservatory.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

This South London cemetery holds the remains of more than 15,000 people.

This coffee shop lies hidden beneath a historic church.

This ancient Hindu temple is covered in thousands of colorful statues and has a long mythological history.

By day this New Orleans square is for pedestrians, but by night it is a kingdom of kittens.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

This cathedral dedicated to Louis IX, sainted King of France, holds many secrets.

This macabre shop, filled with art, oddities, and taxidermy is hidden in the heart of the French Quarter.

A snapshot of the city's fascinating voodoo culture.

After the parade, students throw their beads on the tree hoping for good luck on exams.

Over 50 whirling pools left behind from the glacial age.