The glacier tucked within a New Zealand rainforest.

A glacier pocked with ice caves and surrounded by rainforests.

The premier place to experience the Victorian imagining of the steam-powered future.

A perfect turquoise lake colored with glacier dust.

The first declared National Monument in the United States.

The world's largest Holstein cow.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

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

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

This modest marker near Notre Dame identifies the very center of Paris.

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

Prone to disastrous fires, the city of San Francisco has the Guardian, a fireboat gifted by residents, to watch over them from the bay.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

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

One of the largest underground systems runs under Canada's largest urban center.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.