Visit the monolithic tomb of America's most famous general.

In this case, 'zero' marks the spot where the iconic Old Spanish Trail ends.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

A community of collapsing homes more than a mile out from the Florida coast.

Antiques by the Bay.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

Bronze sculpture celebrating the relationship between Churchill and Roosevelt.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

Sniff the Titan Arum's rotting flesh.

Named the fifth most beautiful building in America in 1885, this former courthouse boasts the best view in the Village.

Once the tallest building in the world and the site of “the highest dinner ever held in New York” this building now holds the most expensive penthouse in the city.

An abandoned water sports stadium that has become a haven for graffiti and decay.

Scattered throughout London are ancient remnants of the city's former bounding wall.

One of the oldest and certainly best preserved Cistercian abbeys still in existence.

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

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

An architect's childhood fantasy treehouse made real.