Connecting the 'intellectually curious traveler', including locals, with Ph.D. level experts for small group tours on niche topics, which vary from architectural history, urban planning, art history, cuisine and immigration.

London's core walks, include the Intro to Architecture, which examines Bloomsbury and Holborn in the company of either architectural historian or a practicing architect. Or for more variety, there's the cross-disciplinary tours such as Gastronomic London, which explore central London through the food made and sold in the area, led by a chef and a culinary historian, participants also get to sample some dishes along the way.

Many more offerings and experts await the most curious of tourist.