Spectacular Glass-Bottomed Attractions

By Marisa Lascala - 2014-04-21T15:53:00Z

Photograph via Conde Nast Traveller

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​Spinnaker Tower

Portsmouth, U.K.

The Spinnaker Tower is a destination unto itself, rising higher than the London Eye, Blackpool Tower, and Big Ben. Take in the view of Portsmouth Harbor from any of three observation decks; the first hosts the 328-foot-high Sky Walk with a see-through floor. The third-floor Sky Deck, 360 feet above sea level, is exposed to the elements, so you can feel the sea breeze as you look out over the water!

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