Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

The only Leonardo Da Vinci painting in the Western Hemisphere.

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

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

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

The bank that helped fund the Mexican-American War and the purchase of Alaska met its downfall after helping Augusto Pinochet launder money.

Picturesque basketball courts sheltered by historical defensive walls and with an enviable sea view.

Split's smallest church, and one of its oldest, has been reconstructed inside the city's Roman walls.

This ancient Roman aqueduct once funneled water to Diocletian's palace.

A World War II evacuation tunnel turned into a history display of Croatian state and people.

The big toe of this towering monument to a Croatian national hero is worn from years of superstitious rubbing.

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

A full figure 4th century incorruptible saint lies in a glass coffin in Croatia.

This scale model of our solar system hid in plain sight for years before a physics team sought out all the planets.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

Gargoyle head that brings good luck.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

A safe sanctuary for rescued shelter cats with an imaginative, glitter-infused experience

A well-worshipped shrine to the Virgin Mary nestled inside the last of Zagreb’s historic gates.

This 135-year-old weather station studied the effects of the climate on human health.

A swaggering, monumental souvenir of the most extravagant party Montreal’s ever thrown.