This towering church is home to a world-famous organ and a treasure trove of medieval art.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

Pyongyang’s Arch of Triumph is the second tallest triumphal arch in the world.

An exotic wildlife habitat right off The Strip.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

Flashy signs from Las Vegas’s past find their final resting place at this unusual graveyard.

The second-largest gold nugget in existence, displayed in a Las Vegas casino conveniently named the Golden Nugget.

A classic Route 66 landmark that was built with scrap lumber and is held together with kitsch and puns.

A monument to the one-armed geologist who led the first documented expeditions through the Grand Canyon.

The story of Two Guns, Arizona could easily be described as a Shakespearian tragedy on Route 66.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

A sharp bend in a dramatic river canyon cut through red rocks.

Most-visited and most-photographed slot canyon in the American Southwest.

The notorious Wild West outlaw was raised in this unassuming abode.

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

A cluster of historic bathhouses built on the famed hot springs that gave the Georgian capital its name.

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

Captured in 1968, the Cold War spy ship is the only U.S. Navy vessel being held by a foreign government.

This unusual lava tube spouts seawater during high surf.

Eastern Bloc nostalgia, anybody?

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

A vast Communist-era exhibition space in the Bulgarian capital.

A striking symbol of the Bulgarian capital.

This large copper bolt represents the benchmark for measuring sea levels in most of Europe.