A former waterfront market is now in the center of town due to some interesting Boston engineering.

This expansive bridge in the Canadian wilderness was originally just built for friends.

Only hotel where you can legally launder money.

A man-made island in scenic San Francisco Bay.

Tiki luxury on Nob Hill.

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

Floating man-made island and upscale restaurant.

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

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

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

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

A very classy 1920s-era bar right in Grand Central Station.

One of only two commuter aerial tramways in the United States.

Mysterious 500-year-old tapestries depict a unicorn hunt.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Elevated freight railway turned wildly successful urban park.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.