The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

This evocatively named natural crevasse was created by a torrent of water that smashed right through a granite deposit.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

Rodin's famous depiction of Dante's 'Inferno', amidst a sculpture garden of many of his other works.

Memorial to a beloved puppeteer as well as all street performers.

The celebrated eyesore created by starry-eyed sweethearts.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

A Parisian exterminator's shop whose storefront displays stuffed rats hanging from traps.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

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

Hear the quietest sound from across the dome.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

A closed London rail station created to cart away the dead still bears the marks of attempts to make it less morbid.

This large cemetery is known as the museum of granite sculptures.

This New England covered bridge is home to the tale of a jilted lover known to haunt the area.

This 38-drawer structure claims the superlative title, but it isn't the world's only giant filing cabinet.

Scary metal statues adorn some of the signature buildings of Burlington, VT.

Home to items never before seen by the public.

This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.