One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

Railways may have forged this quintet of lovely tunnels, but now they are open to hikers.

"Girl in a Wetsuit" is what happens when a sculptor has to find a way around a 100 year old copyright.

This expansive bridge in the Canadian wilderness was originally just built for friends.

A walk through the historic city center, under the streets of Seattle.

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

This salt marsh in Southern France is as pink as the flamingos that inhabit it.

Historic medieval fortified city in southwest France.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

This massive subterranean fissure is known as the "underground Grand Canyon."

Two stone columns flank the grand Venice square, but there were supposed to be three.

A lover's walk between hilltop towns, decorated with graffiti love notes.

Five candy-colored villages on the Italian Riviera.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

Fortified medieval tower house with lovely roof garden.

A little sculpture with a large wardrobe.

When you're a great Russian Tsar, even your vomit gets a statue.

Meet the bronze beloved pet to a family of famous peeing statues.

Longest road tunnel in the world features an air treatment plant and the illusion of daylight.

A Viking-style brewpub named for a Norse sea giant, in the heart of fjord country.

An artist's mausoleum with a haunting echo.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."