The site of Martin Luther King Jr.'s arrest as he attempted to have lunch.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

Possibly the world's oldest rug, this Egyptian relic is woven entirely from ancient cat hair and once carried a mummified human foot.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

Memorial to the lost dead of Gdansk, whose resting places were destroyed during World War II.

One of the first monuments dedicated to the accomplishments of the great Vice Admiral, Horatio Nelson.

The largest terracotta fountain in the world, built to commemorate Britain’s Victorian achievements.

A 14th-century Serbian Orthodox church that was once converted into a mosque under the much-disfavored Ottoman Empire.

This lonely minaret with an unusual decorative symbol is all that remains of a historic Ottoman mosque.

After witnessing the rise and fall of three empires, this ancient city was finally destroyed by a series of earthquakes.

See how paper is made the old-fashioned way.

These abundant, over-the-top monuments are so widely scattered that they define the entire compact capital cityscape, often leading to jokes about whether there are more statues than residents.

This fortress dates back to the 6th century and is also the site of a controversial abandoned restoration project.

The oldest statue in the Netherlands has survived relocation, bombardment, and burial.

In the heart of Luxembourg's "little Switzerland" weaves a breathtaking natural sandstone canyon with a mythological past.

Gdańsk's lion mascot features in a trail of bronze sculptures scattered all across the city.

A mysterious emblem tucked in an small alleyway is actually the coat of arms of a heroic medieval family.

Modern art commemorates one of the first military actions of World War II.

One of the world's largest amber altarpieces is housed within this reconstructed medieval church.

A huge wooden clock that is so beautiful its creator was forcibly blinded.

A merchant court dedicated to the fictitious King Arthur is heavily adorned with bizarre Renaissance art.

These rare statues are one of the few remaining material witnesses to Old Prussian culture.

This antique thermometer honors the creator of the first universal temperature scale.

During the renovation of this bas-relief, the constructors added one unusual element.