This demon atop the Notre-Dame de Paris looks utterly bored.

The celebrated eyesore created by starry-eyed sweethearts.

Former hunting lodge of a duke who was an avid collector of impressionist works.

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

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

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

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

See six states from the newly restored 100-year-old historic roadside attraction.

Colorado's only active volcano last erupted around 4,000 years ago.

When this 160-year-old church was being built, a stonemason included a hidden homage to his late daughter.

A quiet rock and botanical garden is the beautiful centerpiece of Fort Lewis College.

On the edge of grassland in northeastern Colorado, these rock formations are some of the few remnants of a high plain that has eroded away over millions of years.

A short but powerful waterfall resides amid Colorado’s Great Sand Dunes.

One of the few surviving Panama Canal steam shovels stands outside a tiny Colorado mining museum.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

A dangerous narrow-gauge railroad once traced a route through this striking canyon.

Take a dip in the world's largest mineral hot springs pool.

A Rocky Mountain city provides a happy ending for a pinto pony and his Brobdingnagian red chair.

The remnants of the base where US Army troops learned how to fight in extreme conditions.

This remote Colorado canyon is home to the second-largest collection of natural arches in the world.

A glimpse of a waterfall is reached by a steel catwalk along a slot canyon located in an Ouray city park.

An innovative local park built from an abandoned sewage treatment plant.

The giant stump of the once towering cottonwood where Ute people held tribal meetings.

A focal point of in Denver’s skyline for over a century, inspired by a Venetian basilica.