What is in this image? Describe it as if you were explaining it to someone from the 15th century.

Imagine a scene where a carriage sits, not drawn by horses but capable of moving on its own through the use of crafted metal and clever mechanisms. This carriage is crafted with seats and a cover that protects its riders from the sun. Unlike the wooden or iron-bound wheels of your time, these wheels are round and smooth, made to roll quietly over the earth.Near this carriage, there is a tall slender tree that resembles those from distant isles where the sun beats hot, and beneath this tree is a curious object resembling an umbrella, but far larger and sturdier, designed to provide shade from the heat of the sun, which shines brightly in the sky in this tableau.This fantastical scene is set upon what looks like a sandy shore, similar to the places where the land meets the sea. Stones and grains of sand are loosely scattered around, and the ambiance is one of leisure and respite from the usual busyness that such a modern carriage might imply.