Some ideas for fictional tracks and environments using real life cities:
“Amalfi Coast” @ Amalfi, Italy
“Rally di Positano” @ Amalfi, Italy
Amsterdam, Netherlands
Beirut, Lebanon
Bruges, Belgium
Budapest, Hungary
Busan, South Korea
Cape Town, South Africa
Cartagena, Colombia
Charleston, South Carolina, USA
Chicago, Illinois, USA
Côte d’Azur, France
Dallas, Texas, USA
Dubai, United Arab Emirates
Edinburgh, Scotland, UK
Florence, Italy
“Fujimi Kaido” @ Fujimi, Nagano, Japan
Greensboro, North Carolina, USA
Hamburg, Germany
Havana, Cuba
Hong Kong, China
Jaipur, India
Kiev, Ukraine
Krakow, Poland
Kyoto, Japan
Lucerne, Switzerland
“Maple Valley Raceway” @ Maple Valley, USA
Milan, Italy
“Camino Viejo de Montserrat” @ Montserrat Spain
“Iberian International Circuit” @ Montserrat Spain
"Ladera Test Track " @ Montserrat Spain
Muscat, Oman
Nantes, France
New York, New York, USA
Paris, France
Phoenix, Arizona, USA
Prague, Czech Republic
Québec City, Canada
Queenstown, New Zealand
Rennes, France
Rio de Janeiro, Brazil
Rome, Italy
Rouen, France
“Sedona Raceway” @ Sedona, USA
Seville, Spain
St. Petersburg, Russia
Stockholm, Sweden
“Sunset Peninsula Raceway” @ Sunset, USA
Sydney, Australia
“Sidewinder Proving Grounds” @ Tuscany, Italy
Vienna, Austria
Some ideas for fictional tracks and environments using real life roads and mountains:
A535 road (Cheshire, England, UK)
A591 road (Kendal to Keswick, North West, England, UK)
ALP-822 (San José (Almería) to Cabo de Gata, Spain)
Autobahnen (Germany)
B3515 (Cheddar to Ashwick, Southwest, England, UK)
Bayshore Route of Shuto Expressway “Wangan-sen” (Yokohama city, Kanazawa ward to Ichikawa city of Chiba Prefecture, Japan)
Bernese Alps (Switzerland)
Col de Turini (Alpes-Maritimes, France)
Conor Pass (County Kerry, Ireland)
D81 (Piana to Porto in Corsica, France)
Denali Highway / Alaska Route 8 (Alaska, USA)
Flüela Pass (Graubünden, Switzerland)
Great Ocean Road (The Twelve Apostles to Apollo BayVictoria, Australia)
Guoliang Tunnel Road (Huixian, Xinxiang, Henan Province, China)
Henshin Expressway Route 1: Loop Route (central Osaka, Japan)
Highway 1 (Castroville to Big Sur, California, USA)
HU-631 (Escalona to Rios Bellosvia, Spain)
Jebel Hafeet Mountain Road (near Al Ain, Emirate of Abu Dhabi, United Arab Emirates)
Karakoram Highway (Punjab, Pakistan to Xinjian, China)
Karamea Highway (West Coast, New Zealand)
Khardung La (Ladakh, Jammu and Kashmir, India)
L126 (Titisee to Bad Krozingen, Baden-Württemberg, Germany)
Lysevegen (Rogaland county, Norway)
Mount Fuji (Shizuoka and Yamanashi Prefectures, Japan)
National Route 40 “Ruta 40” (Cuesta de Miranda to the La Rioja/San Juan province borderline, Argentina)
N-222 (Peso da Régua to Pinhão, Portugal)
N247/Avenida do Atlântico (Sintra to Praia das Maças, Portugal)
N267 (São Marcos da Serra to Monchique, Portugal)
N-634 (Zumaia to Zarauz, Spain)
Nihon Romantic Highway (Chugushi to the 120 road split, Japan)
Overseas Highway (Long Point Key to Florida Keys, Florida, USA)
Portofino to Portofino Vetta (Liguria, Italy)
Route Napoléon / N85 (Cannes to Grenoble, France)
S165 (Hohnstein to Bad Schandau, Germany)
San Juan Skyway (Colorado, USA)
Sani Pass (KwaZulu Natal, South Africa to Mokhotlong, Lesotho)
Strada statale 38 del Passo Stelvio (Lombardia and Trentino-Alto Adige, Italy)
Tail of the Dragon at Deals Gap (North Carolina and Tennessee, USA)
Taroko Gorge / Taroko National Park (Taichung Municipality, Nantou County, and Hualien County, Taiwan)
Transfăgărășan (Argeș and Sibiu Counties, Romania)
Trollstigen (Møre og Romsdal county, Norway)
White Rim Road (Utah, USA)
EDIT: Added Autobahn and Wangan-sen