Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

The iconic D.C. restaurant where the Cuban Missile Crisis was negotiated, now a Walgreens.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

Decades before the scandal, this staircase on the river was a literal "water gate."

A bit of retro transportation flair preserved in the world's largest department store.

In its day this historic fort held 100 cannons pointed in almost every direction to protect New York.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

A much-maligned monument to teetotalism.

The record holder for the world’s largest peach.

A historic Civil War estate-turned-museum looks back on the Confederate States of America.

This elaborate towering structure was once famed for its revolutionary height.

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

This awesome Spanish castle is so fantastical it was actually used on Game of Thrones.

This underground church is topped with a 500-foot cross that is seen by many as a beacon of fascist hubris.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

An ancient Egyptian temple in the middle of Madrid, Spain.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Quite simply the largest tree in the world (by volume).

This former stomping grounds of the most eminent astronomers of the early 20th century.

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.