The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

One of the greatest heroes of the Titanic tragedy came from humble beginnings to this beautiful home.

A Rocky Mountain city provides a happy ending for a pinto pony and his Brobdingnagian red chair.

This was once the home of Gahan's Saloon, Denver's most storied speakeasy.

A unique auditory experience right on the sidewalk.

These murals from the 1920s beautifully depict America’s industrial age.

A focal point of in Denver’s skyline for over a century, inspired by a Venetian basilica.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

This historic hub for labor unions has survived the city's changing landscape.

A rotting tree in the middle of Seattle doubles as an elaborately-controlled art piece.

This sculpture forces visitors to confront their relationship with space.

A museum dedicated to the history and exploration of both popular music and science fiction.

A community gathering place that once housed half-ton tanks and the World's Fair.

New Plymouth, Idaho is the only U-shaped town in the United States.

This fortress dates back to the 6th century and is also the site of a controversial abandoned restoration project.

In the hometown of the Catholic saint and Nobel Peace Prize winner, a memorial dedicated to her legacy.

These abundant, over-the-top monuments are so widely scattered that they define the entire compact capital cityscape, often leading to jokes about whether there are more statues than residents.

Longest fortress system anywhere in Europe.

This fortified town dating back to the 1400s is often described as an open-air museum and is a protected National Monument of Bosnia and Herzegovina.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'

An ancient knight and a symbol of the city's freedom.

A wunderkammer of gold and silver reliquaries and ancient saintly bones.

Gargoyle head that brings good luck.