Soaring over the Niagara Whirlpool since 1916.

Two small markers remember the Alamo's feline protectors.

An ivy-covered arch bridge dedicated to Tejano music singer and legend Rosita Fernandez.

A gorgeous garden oasis with winding paths, stone bridges, and a troubling history.

Apparently, Hell has waterfalls in Slovenia.

An unmistakable facial pareidolia in the Julian Alps also includes a fantastic tale.

The "dragon babies" of southeastern Europe.

The walls of this medieval church are covered with perfectly preserved frescos, including a pristine example of the Dance of Death.

A miniature train-ride through Slovenia's largest cave system.

This one-time health resort was used by aristocrats around the world.

A roadway designed for a visiting monarch.

This mundane post marks the old location of the city's main postal hub.

This was once a hall in which a 16th-century royal banquet was hosted by King James VI of Scotland.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

Come for the oysters, stay for the priceless art honoring inventors across history and Scotland's favorite outdoor sports.

A beautiful Greco-Roman structure houses a well once believed to have healing powers.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

A random tree outside a Budapest hotel has become a DIY shrine to the late singer.

This secret garden has bloomed into London's most unique hub of urban creativity.

This hydraulic power system in London was, at one time, seen as a rival to electricity and the last of its kind to shut down.

A haunting monument dedicated to the Royal Naval Air Service and the Fleet Air Arm.

Formerly known as Saville Theatre, this mid-20th-century entertainment hub includes an ornate frieze.

A plaque pays tribute to the artist's longtime London home.