This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

A Gothic cathedral created from volcanic rocks.

Historic medieval fortified city in southwest France.

A 14th century bridge built as a fortress, where the devil lurks on one of its towers.

Pop culture has helped to keep this iconic British building from being destroyed.

Giant, friendly pelicans in Central London, the most unlikely of places.

In the Monastery of São Vicente resides a gallery devoted to a breathtaking collection of seashells.

The city’s oldest gateway to the galaxy lies at the entrance to the Royal Botanical Gardens.

The best place in the world to buy tinned fish.

The statue honors an adventurous seafaring cat.

People can't get enough of these adorable Japanese photobooths.

The unique work of art celebrates the 30th anniversary of the 1988 World Expo.

This Manhattan skyscraper is a reminder of the brief but glorious age of urban air taxis.

The home of the first American-born saint is one of the only curved buildings in New York.

This anonymous businessman sculpted in bronze became an enduring memorial after 9/11, and had been mistaken by rescue workers for a survivor in the rubble.

The 28-foot granite map plots the locations of 40 theaters in New York City.

The most confusing clock in New York.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Unrepaired walls from a 1920 anarchist bomb attack.

A bit of retro transportation flair preserved in the world's largest department store.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.