The beautiful tunnel that ran from the lobby to Penn Station is still hidden underneath 34th Street.

Great place to have a drink and a bite to eat in an atmosphere laden with New York's Bohemian past.

For over 30 years the walls of this Harlem schoolyard have been a gallery of street art by "Kings and better."

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

The oldest operating apothecary in the US has treated everyone from Thomas Edison to Mark Twain.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

New York City's smallest piece of private property.

"Holy Wisdom" overlooks the city that became its namesake.

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

Eastern Bloc nostalgia, anybody?

This historic black and white monastery is one of Bulgaria's architectural jewels.

An homage to the medieval rulers of Bulgaria.

A mountain pass in Bulgaria's Balkan Mountains was the site of four historic battles.

The remarkably well-preserved final resting place of a powerful ancient Thracian king.

A magnificent, glittering building tucked into a tiny Bulgarian mountain town.

Over 60 chemical plants and oil refineries sit in a 15-mile-wide section outside town.

One of the largest underground systems runs under Canada's largest urban center.

Louise Bourgeois' 30-foot-tall steel spider sculpture.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

Willy Wonka would love this weird half-a-home.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

A terrific purveyor of natural history objects and curios.

It looks like a whale, it's part of Yale, and it's best-known by a nickname you can probably work out for yourself.