Adam sleuths out London's tastiest secret eats, like a speakeasy disguised as a detective agency, a sundae that requires customers to dance, a limited supply barbecue sandwich and a restaurant hidden inside an antique market.

Adam finds a speakeasy, a secret closed-door restaurant and off-menu steaks in Buenos Aires.

Adam Richman finds off-menu Pad Thai and a floating food market in Bangkok, Thailand.

Adam Richman finds secret eats at a speakeasy and a hidden restaurant in Moscow, Russia.

Adam Richman travels to Rome to uncover the city's culinary secrets, including a unique take on Cacio e Pepe at a restaurant located in a castle-walled city and traditional porchetta in limited supply.

Adam Richman seeks out the best off-menu eats in Cape Town, South Africa.

Adam Richman finds secret eats in Warsaw, Poland, including a Polish spin on Neapolitan pizza, an off-menu version of a classic Polish street food, and a homestyle restaurant hidden inside an apartment building.

Adam Richman's on the hunt for secret restaurants and off-menu dishes in Ho Chi Minh City, Vietnam, including a hidden bowl of pho, off-menu cashew smoked ribs, a secret soul music burger and a hidden garden restaurant in the middle of the city.

Adam Richman seeks out secret eats in Kuala Lumpur, Malaysia, including satay found off the beaten path, a spicy burger with black buns and a nature hike that leads to the best grilled seafood in the city.

Adam Richman samples the off-menu eats of Johannesburg, South Africa.

Adam Richman seeks out Singapore's secret eats, including chilli crab at a hard-to-find restaurant, chasiu at a speakeasy hidden beneath a ramen shop and a gourmet hot dog in a movie theater parking garage.

Top Secret Tacos

Adam Richman is on the hunt for secret eats in Hong Kong, including a giant off-menu tomahawk steak at a hard-to-spot pub and wings at a speakeasy hidden inside a stamp shop.

Adam Richman travels to Manila to find the city's best off-menu dishes.

Adam Richman seeks out off-menu dishes in Reykjavik, Iceland, including a holiday-inspired pizza with unusual toppings, a meatball sandwich at a laundromat and traditional Icelandic

Adam Richman looks for hidden eats in Ilulissat and Oqaatsut, Greenland, including off-menu reindeer schnitzel, fried rice that combines Thai and Greenlandic flavors and an off-the-grid

Adam seeks biker-approved secret eats at South Dakota's Sturgis Motorcycle Rally, including a pop-up barbecue pit serving a secret sandwich, off-menu wild boar poppers in a Deadwood saloon,