Here are some possibilities:
To express your purpose:
* vengo a la fiesta: I'm coming to the party.
* vengo a la escuela: I'm coming to school.
* vengo a la tienda: I'm coming to the store.
* vengo a la playa: I'm coming to the beach.
* vengo a la oficina: I'm coming to the office.
To describe the place:
* vengo a la casa de mi abuela: I'm coming to my grandmother's house.
* vengo a la ciudad: I'm coming to the city.
* vengo a la montaña: I'm coming to the mountain.
* vengo a la costa: I'm coming to the coast.
To specify the time:
* vengo a la tarde: I'm coming in the afternoon.
* vengo a la mañana: I'm coming in the morning.
To express the method of arrival:
* vengo a la carrera: I'm coming running.
* vengo a la velocidad de la luz: I'm coming at the speed of light.
* vengo a la bicicleta: I'm coming on a bike.
Please provide more information about the context, and I'll be able to give you a more specific answer.