A symbol of Texas pride.

A city park that sits on top of a freeway.

This downtown Dallas art installation is always on the lookout.

This sculpture of a bowler hat is complemented by a matching umbrella a few blocks away.

A trio of colossal statues spread across a Dallas neighborhood chart the emergence of a giant robot born of a locomotive and spilled gin.

A "Texanic" (gigantic Texas) collection of Art Deco architecture at Dallas' historic Fair Park.

Lavish royal estate punctuated with heated greenhouses.

The fragmented remains of a massive public bath connected to the city's water supply.

A lush indoor jungle fills this bustling Madrid transportation hub.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

The narrowest street in Paris.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

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

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

Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

It's good luck to be mocked by this monkey.

A preserved college lock-up that recalls a clubhouse approach to discipline.