Once designed as the entrance to Buckingham Palace, this structure was later relocated and stands as a victory arch.

A memorial for public executions that dates back to the 14th century.

The Great Fire of London and the regulation of one-way streets both started in this alley.

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

A hidden treasure in London with a rich medieval history, and the resting place of many luminaries.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Scattered throughout London are ancient remnants of the city's former bounding wall.

France's most famous cemetery, with some of its most curious tombs.

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

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

A wonderland of caves in eastern Iowa.

A mysterious local has been dressing the child's grave for decades.

This unconventional used book store was once in the news for the surprising act of burning books.

A half-size replica of the World Trade Center towers above Tulsa.

A museum packed with instruments, lyrics, and other mementos of the American folk icon.

An acoustic anomaly with a mysterious cause.

Although it also features red, orange, and variegated cliffs of Navajo Sandstone, this state park is often overshadowed by its more famous neighbor.

Dozens of rockets and missiles are on display outside a testing facility in the Utah desert.

Once a giant oak that served as the region's post office.

One of the stops along the fateful journey of the Donner Party.

A Kansas grassroots sculptor decorates the local roadways with his sculptures made from found objects.

This incredible college library is a visual masterpiece of mosaic art. It also looks kind of like a giant boombox.

This ruined fort and statue are a testament to the last king of Kaua‘i’s savvy diplomacy skills, which briefly brought Russians to Hawai‘i.

A eclectic collection of military memorabilia.