As far as early-morning workouts go, it’s certainly one worth waking up for. The newly-opened Tower Bridge glass walkway – situated 42m (138ft) above the river Thames, London, UK – has started offering sunrise yoga classes for those wanting to awaken their chi inside one of the world’s most famous attractions.

The £15 (US$23 €20) classes offered by London-based yoga teacher Billie Woodcraft kicked off on 16 February, with each of the inaugural eight sessions having sold out well in advance.

Participants will hone their downward dogs on the Purcell Architects-designed glass floors along Tower Bridge’s East and West high-level walkways, which each measure 11m (36ft) long and 1.8m (6ft) wide and can withstand the weight equivalent of one elephant or two London Black Cabs. Mats will be provided for the yoga classes, but organisers recommend using gripped gloves and socks to maximise the experience on the new glass floor.

The view yoga participants will see from the walkway

The yoga classes are “designed to revitalise and inject energy into Londoners with an exciting and never-seen-before view from inside the most famous bridge in the world.”

The innovative fitness offering marks the latest in a growing list of exercise sessions emerging in iconic architectural spaces – similar yoga classes are available from Yogasphere 310m (1,016ft) above London in The Shard, while proposals have recently been put forward to create swimming baths in the Thames, and a cycle superhighway in the city’s abandoned underground tunnels.

History enthusiasts could soon be offered the chance to cycle along the path of the former Iron Curtain, while Melbourne’s famous harbour is the subject of plans to create an artificial surfing park.

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