The tallest hotel in Europe.

World's largest bell sits on the grounds of the Kremlin in Moscow.

Former headquarters of the KGB.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

The ruins of an ancient city built by Mayan traders is centered around a temple of a sacred feathered serpent deity.

The conquistador's former fortress is the oldest preserved colonial building in the Americas.

Outstanding taxidermy dioramas showcase the grandeur of the continent's wildlife with spooky realism.

Once the tallest building in Detroit, this Gothic church houses some of the oldest stained-glass windows in the country.

This taxidermy horse was a Civil War hero.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

Largest Roman Catholic church in North America.

In Florence's great Duomo, a 26 foot fresco honors a mercenary famous for attacking Florence.

A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.

After four years of grasshopper plagues, this chapel was erected as a plea to God to make them end.

This massive roadside mascot was the first version of the giant to illustrate his butt.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

A rather vulgar example of the transition from Latin to the Italian vernacular.

The best preserved Paleochristian basilica in Rome hides a number of oddities and secrets.

A huge enchanting public park just outside the ancient walls of Rome.

A curious memento mori hangs in the magnificent Cathedral of Segovia.