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

This Parisian gem is one of the most incredible ethnographic museums in the world.

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.

This little-known relic crypt holds stolen parts of a Roman Empress.

A Parisian exterminator's shop whose storefront displays stuffed rats hanging from traps.

The narrowest street in Paris.

A surrealist timepiece by the artist of melting clocks.

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

The oldest stone house in Paris was built by its most famous alchemist.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

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

The drama of nature in full effect in this Nevada State Park.

Named after an outlaw who used the basin as a hideout.

Colorful sand dunes create a unique attraction in this part of Utah's red-rock country.

Walk through the sets of old western films at this small museum in Utah.

The unusual patterns in this rock formation result from two distinct modes of weathering.

A striking, menacing sandstone peak towering above a landscape that's equal parts Mordor and the Moon.

This quiet park's strange sedimentary spires were named after Kodak's color film.

A tunnel with windows, so you don't miss out on the impressive views.

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

An Ancestral Puebloan ruin that appears to burst into flames in the sunlight.